Cardiovascular Flashcards, Exam two

A client in a postpartum unit complains of sudden sharp chest pain and dyspnea. The nurse notes that the client is tachycardic and the respiratory rate is elevated. The nurse suspects a pulmonary embolism. Which should be the initial nursing action?

Administer oxygen, 8 to 10 L/minute, by face mask. - f pulmonary embolism is suspected, oxygen should be administered, 8 to 10 L/minute, by face mask. Oxygen is used to decrease hypoxia. The client also is kept on bed rest with the head of the bed slightly elevated to reduce dyspnea. Morphine sulfate may be prescribed for the client, but this would not be the initial nursing action. An intravenous line also will be required, and vital signs need to be monitored, but these actions would follow the administration of oxygen.

A client with myocardial infarction suddenly becomes tachycardic, shows signs of air hunger, and begins coughing frothy, pink-tinged sputum. Which finding would the nurse anticipate when auscultating the client's breath sounds?

Crackles - Pulmonary edema is characterized by extreme breathlessness, dyspnea, air hunger, and the production of frothy, pink-tinged sputum. Auscultation of the lungs reveals crackles. Rhonchi and diminished breath sounds are not associated with pulmonary edema. Stridor is a crowing sound associated with laryngospasm or edema of the upper airway.

A client is diagnosed with an ST segment elevation myocardial infarction (STEMI) and is receiving a tissue plasminogen activator, alteplase. Which action is a priority nursing intervention?

Monitor for signs of bleeding. - Tissue plasminogen activator is a thrombolytic. Hemorrhage is a complication of any type of thrombolytic medication. The client is monitored for bleeding. Monitoring for renal failure and monitoring the client's psychosocial status are important but are not the most critical interventions. Heparin may be administered after thrombolytic therapy, but the question is not asking about follow-up medications.

The nurse in the medical unit is reviewing the laboratory test results for a client who has been transferred from the intensive care unit (ICU). The nurse notes that a cardiac troponin T assay was performed while the client was in the ICU. The nurse determines that this test was performed to assist in diagnosing which condition?

Myocardial infarction - Cardiac troponin T or cardiac troponin I have been found to be a protein marker in the detection of myocardial infarction, and assay for this protein is used in some institutions to aid in the diagnosis of a myocardial infarction. The test is not used to diagnose heart failure, ventricular tachycardia, or atrial fibrillation.

A client in sinus bradycardia, with a heart rate of 45 beats per minute and blood pressure of 82/60 mm Hg, reports dizziness. Which intervention should the nurse anticipate will be prescribed?

Prepare for transcutaneous pacing. - Sinus bradycardia is noted with a heart rate less than 60 beats per minute. This rhythm becomes a concern when the client becomes symptomatic. Hypotension and dizziness are signs of decreased cardiac output. Transcutaneous pacing provides a temporary measure to increase the heart rate and thus perfusion in the symptomatic client. Defibrillation is used for treatment of pulseless ventricular tachycardia and ventricular fibrillation. Digoxin will further decrease the client's heart rate. Continuing to monitor the client delays necessary intervention.

Intravenous heparin therapy is prescribed for a client with atrial fibrillation. While implementing this prescription, the nurse ensures that which medication is available on the nursing unit?

Protamine sulfate - The antidote to heparin is protamine sulfate; it should be readily available for use if excessive bleeding or hemorrhage should occur. Vitamin K is an antidote for warfarin sodium. Potassium chloride is administered for a potassium deficit. Aminocaproic acid is the antidote for thrombolytic therapy

The nurse is preparing discharge instructions for a client with Raynaud's disease. The nurse should plan to provide which instruction to the client?

Stop smoking because it causes cutaneous blood vessel spasm. - Raynaud's disease is peripheral vascular disease characterized by abnormal vasoconstriction in the extremities. Smoking cessation is one of the most important lifestyle changes that the client must make. The nurse should emphasize the effects of tobacco on the blood vessels and the principles involved in stopping smoking. The nurse needs to provide information to the client about smoking cessation programs available in the community. It is not necessary to wear gloves for all activities, nor should warm clothing be worn in warm climates.

he nurse notes that a client with sinus rhythm has a premature ventricular contraction that falls on the T wave of the preceding beat. The client's rhythm suddenly changes to one with no P waves, no definable QRS complexes, and coarse wavy lines of varying amplitude. How should the nurse interpret this rhythm?

Ventricular fibrillation - Ventricular fibrillation is characterized by irregular chaotic undulations of varying amplitudes. Ventricular fibrillation has no measurable rate and no visible P waves or QRS complexes and results from electrical chaos in the ventricles.

The nurse is watching the cardiac monitor and notices that a client's rhythm suddenly changes. There are no P waves, the QRS complexes are wide, and the ventricular rate is regular but more than 140 beats per minute. The nurse determines that the client is experiencing which dysrhythmia?

Ventricular tachycardia - Ventricular tachycardia is characterized by the absence of P waves, wide QRS complexes (longer than 0.12 seconds), and typically a rate between 140 and 180 impulses per minute. The rhythm is regular.

The home care nurse is providing instructions to a client with an arterial ischemic leg ulcer about home care management and self-care management. Which statement, if made by the client, indicates a need for further instruction?

"I need to be sure that I elevate my leg above the level of my heart for at least an hour every day." - Foot care instructions for the client with peripheral arterial disease are the same as those for a client with diabetes mellitus. The client with arterial disease, however, should avoid raising the legs above the level of the heart unless instructed to do so as part of an exercise program or if venous stasis is also present. The client statements in the remaining options are correct statements and indicate that the teaching has been effective.

The nurse provides discharge instructions to a client with atrial fibrillation who is taking warfarin sodium. Which statement, by the client, reflects the need for further teaching?

"I will take coated aspirin for my headaches because it will coat my stomach. - Aspirin-containing products need to be avoided when a client is taking this medication. Alcohol consumption should be avoided by a client taking warfarin sodium. Taking the prescribed medication at the same time each day increases client compliance. The MedicAlert bracelet provides health care personnel with emergency information.

The home health care nurse is visiting a client with coronary artery disease with elevated triglyceride levels and a serum cholesterol level of 398 mmol/L). The client is taking cholestyramine, and the nurse teaches the client about the medication. Which statement by the client indicates the need for further teaching?

"I'll continue my nicotinic acid from the health food store." - Nicotinic acid, even an over-the-counter form, should be avoided because it may lead to liver abnormalities. All lipid-lowering medications also can cause liver abnormalities, so a combination of nicotinic acid and cholestyramine resin needs to be avoided. Constipation and bloating are the 2 most common adverse effects. Walking and the reduction of fats in the diet are therapeutic measures to reduce cholesterol and triglyceride levels.

The nurse provides instructions to the client about nicotinic acid prescribed for hyperlipidemia. Which statement by the client indicates understanding of the instructions?

"Ibuprofen taken 30 minutes before the nicotinic acid may decrease the flushing." - Flushing is an adverse effect of this medication. Aspirin or a nonsteroidal antiinflammatory drug, as prescribed, can be taken 30 minutes prior to taking the medication to decrease flushing. Alcohol consumption needs to be avoided because it will enhance this effect. The medication should be taken with meals to decrease gastrointestinal upset; however, taking the medication with meals has no effect on the flushing. Clay-colored stools are a sign of hepatic dysfunction and should be reported to the primary health care provider (PHCP) immediately.

A client with variant angina is scheduled to receive an oral calcium channel blocker twice daily. Which statement by the client indicates the need for further teaching?

"My spouse told me that since I have developed this problem, we are going to stop walking in the mall every morning." - Variant angina, or Prinzmetal's angina, is prolonged and severe and occurs at the same time each day, most often at rest. The pain is a result of coronary artery spasm. The treatment of choice is usually a calcium channel blocker, which relaxes and dilates the vascular smooth muscle, thus relieving the coronary artery spasm in variant angina. Adverse effects can include peripheral edema, hypotension, bradycardia, and heart failure. Grapefruit juice interacts with calcium channel blockers and should be avoided. If bradycardia occurs, the client should contact the primary health care provider or cardiologist. Clients should also be taught to change positions slowly to prevent orthostatic hypotension. Physical exertion does not cause this type of angina; therefore, the client should be able to continue morning walks with her or his spouse.

The nurse in a medical unit is caring for a client with heart failure. The client suddenly develops extreme dyspnea, tachycardia, and lung crackles. The nurse immediately asks another nurse to contact the primary health care provider and prepares to implement which priority interventions? Select all that apply.

1. Administering oxygen 2.Inserting a Foley catheter 3.Administering furosemide 4.Administering morphine sulfate intravenously - Extreme dyspnea, tachycardia, and lung crackles in a client with heart failure indicate pulmonary edema, a life-threatening event. In pulmonary edema, the left ventricle fails to eject sufficient blood, and pressure increases in the lungs because of the accumulated blood. Oxygen is always prescribed, and the client is placed in a high-Fowler's position to ease the work of breathing. Furosemide, a rapid-acting diuretic, will eliminate accumulated fluid. A Foley catheter is inserted to measure output accurately. Intravenously administered morphine sulfate reduces venous return (preload), decreases anxiety, and also reduces the work of breathing. Transporting the client to the coronary care unit is not a priority intervention. In fact, this may not be necessary at all if the client's response to treatment is successful.

The nurse is monitoring a client with heart failure who is taking digoxin. Which findings are characteristic of digoxin toxicity? Select all that apply.

1. Diarrhea 4.Blurred vision 5.Nausea and vomiting - Digoxin is a cardiac glycoside. The risk of toxicity can occur with the use of this medication. Toxicity can lead to life-threatening events and the nurse needs to monitor the client closely for signs of toxicity. Early signs of toxicity include gastrointestinal manifestations such as anorexia, nausea, vomiting, and diarrhea. Subsequent manifestations include headache; visual disturbances such as diplopia, blurred vision, yellow-green halos, and photophobia; drowsiness; fatigue; and weakness. Cardiac rhythm abnormalities can also occur. The nurse also monitors the digoxin level. The optimal therapeutic range for digoxin is 0.5 to 2.0 ng/mL (0.63 to 2.56 nmol/L).

he client has developed atrial fibrillation, with a ventricular rate of 150 beats per minute. The nurse should assess the client for which associated signs and/or symptoms? Select all that apply.

1. Syncope 2.Dizziness 3.Palpitations - The client with uncontrolled atrial fibrillation with a ventricular rate more than 100 beats per minute is at risk for low cardiac output because of loss of atrial kick. The nurse assesses the client for palpitations, chest pain or discomfort, hypotension, pulse deficit, fatigue, weakness, dizziness, syncope, shortness of breath, and distended neck veins. Hypertension and flat neck veins are not associated with the loss of cardiac output.

A client has been admitted to the hospital for gastroenteritis and dehydration. The nurse determines that the client has received adequate volume replacement if the blood urea nitrogen (BUN) level drops to which value?

15 mg/dL (5.4 mmol/L) - The normal BUN level is 10 to 20 mg/dL (3.6 to 7.1 mmol/L). Values of 29 mg/dL (10.44 mmol/L) and 35 mg/dL (12.6 mmol/L) reflect continued dehydration. A value of 3 mg/dL (1.08 mmol/L) reflects a lower than normal value, which may occur with fluid volume overload, among other conditions.

A client with a history of heart failure is due for a morning dose of furosemide. Which serum potassium level, if noted in the client's laboratory report, should be reported before administering the dose of furosemide?

3.2 mEq/L (3.2 mmol/L) - The normal serum potassium level in the adult is 3.5 to 5.0 mEq/L (3.5 to 5.0 mmol/L). The correct option is the only value that falls below the therapeutic range. Administering furosemide to a client with a low potassium level and a history of cardiac problems could precipitate ventricular dysrhythmias. The remaining options are within the normal range

A client in ventricular fibrillation is about to be defibrillated. To convert this rhythm effectively, the monophasic defibrillator machine should be set at which energy level (in joules, J) for the first delivery?

360 J - The energy level used for all defibrillation attempts with a monophasic defibrillator is 360 joules.

he nurse is assigned to care for a group of clients. On review of the clients' medical records, the nurse determines that which client is most likely at risk for a fluid volume deficit?

A client with an ileostomy - A fluid volume deficit occurs when the fluid intake is not sufficient to meet the fluid needs of the body. Causes of a fluid volume deficit include vomiting, diarrhea, conditions that cause increased respirations or increased urinary output, insufficient intravenous fluid replacement, draining fistulas, and the presence of an ileostomy or colostomy. A client with heart failure or on long-term corticosteroid therapy or a client receiving frequent wound irrigations is most at risk for fluid volume excess.

A client with atrial fibrillation is receiving a continuous heparin infusion at 1000 units/hr. The nurse determines that the client is receiving the therapeutic effect based on which results?

Activated partial thromboplastin time of 60 seconds - Common laboratory ranges for activated partial thromboplastin time (aPTT) are 30 to 40 seconds. Because the aPTT should be 1.5 to 2.5 times the normal value, the client's aPTT would be considered therapeutic if it was 60 seconds. Prothrombin time assesses response to warfarin therapy.

The nurse is caring for a client who has just had implantation of an automatic internal cardioverter-defibrillator. The nurse should assess which item based on priority?

Activation status and settings of the device - The nurse who is caring for the client after insertion of an automatic internal cardioverter-defibrillator needs to assess device settings, similar to after insertion of a permanent pacemaker. Specifically, the nurse needs to know whether the device is activated, the heart rate cutoff above which it will fire, and the number of shocks it is programmed to deliver. The remaining options are also nursing interventions but are not the priority.

The nurse is caring for a client who has just had implantation of an automatic internal cardioverter-defibrillator. The nurse should assess which item based on priority?

Activation status of the device, heart rate cutoff, and number of shocks it is programmed to deliver - The nurse who is caring for the client after insertion of an automatic internal cardioverter-defibrillator needs to assess device settings, similar to after insertion of a permanent pacemaker. Specifically, the nurse needs to know whether the device is activated, the heart rate cutoff above which it will fire, and the number of shocks it is programmed to deliver. The remaining options are also nursing interventions but are not the priority.

A client who had cardiac surgery 24 hours ago has had a urine output averaging 20 mL/hr for 2 hours. The client received a single bolus of 500 mL of intravenous fluid. Urine output for the subsequent hour was 25 mL. Daily laboratory results indicate that the blood urea nitrogen level is 45 mg/dL (16 mmol/L) and the serum creatinine level is 2.2 mg/dL (194 mcmol/L). On the basis of these findings, the nurse would anticipate that the client is at risk for which problem?

Acute kidney injury - The client who undergoes cardiac surgery is at risk for renal injury from poor perfusion, hemolysis, low cardiac output, or vasopressor medication therapy. Renal injury is signaled by decreased urine output and increased blood urea nitrogen (BUN) and creatinine levels. Normal reference levels are BUN, 10 to 20 mg/dL (3.6 to 7.1 mmol/L), and creatinine 0.6 to 1.2 mg/dL (53 to 106 mcmol/L) for males and 0.5 to 1.1 mg/dL (44 to 97 mcmol/L) for females. The client may need medications to increase renal perfusion and possibly could need peritoneal dialysis or hemodialysis. No data in the question indicate the presence of hypovolemia, glomerulonephritis, or urinary tract infection.

The nurse is evaluating a client's response to cardioversion. Which assessment would be the priority?

Airway patency - Nursing responsibilities after cardioversion include maintenance first of a patent airway, and then oxygen administration, assessment of vital signs and level of consciousness, and dysrhythmia detection.

The nurse is caring for a client with heart failure. On assessment, the nurse notes that the client is dyspneic, and crackles are audible on auscultation. What additional manifestations would the nurse expect to note in this client if excess fluid volume is present?

An increase in blood pressure and increased respirations :A fluid volume excess is also known as overhydration or fluid overload and occurs when fluid intake or fluid retention exceeds the fluid needs of the body. Assessment findings associated with fluid volume excess include cough, dyspnea, crackles, tachypnea, tachycardia, elevated blood pressure, bounding pulse, elevated CVP, weight gain, edema, neck and hand vein distention, altered level of consciousness, and decreased hematocrit. Dry skin, flat neck and hand veins, decreased urinary output, and decreased CVP are noted in fluid volume deficit. Weakness can be present in either fluid volume excess or deficit.

The nurse should evaluate that defibrillation of a client was most successful if which observation was made?

Arousable, sinus rhythm, blood pressure (BP) 116/72 mm Hg - After defibrillation, the client requires continuous monitoring of electrocardiographic rhythm, hemodynamic status, and neurological status. Respiratory and metabolic acidosis develop during ventricular fibrillation because of lack of respiration and cardiac output. These can cause cerebral and cardiopulmonary complications. Arousable status, adequate BP, and a sinus rhythm indicate successful response to defibrillation

The nurse is watching the cardiac monitor, and a client's rhythm suddenly changes. There are no P waves; instead, there are fibrillatory waves before each QRS complex. How should the nurse interpret the client's heart rhythm?

Atrial fibrillation - Atrial fibrillation is characterized by a loss of P waves and fibrillatory waves before each QRS complex. The atria quiver, which can lead to thrombus formation.

The nurse creates a plan of care for a client with deep vein thrombosis. Which client position or activity in the plan should be included?

Bed rest with elevation of the affected extremity - For the client with deep vein thrombosis, elevation of the affected leg facilitates blood flow by the force of gravity and also decreases venous pressure, which in turn relieves edema and pain. A flat or dependent position of the leg would not achieve this goal. Bed rest is indicated to prevent emboli and to prevent pressure fluctuations in the venous system that occur with walking.

A client is having frequent premature ventricular contractions. The nurse should place priority on assessment of which item?

Blood pressure and oxygen saturation - Premature ventricular contractions can cause hemodynamic compromise. Therefore, the priority is to monitor the blood pressure and oxygen saturation. The shortened ventricular filling time can lead to decreased cardiac output. The client may be asymptomatic or may feel palpitations. Premature ventricular contractions can be caused by cardiac disorders; states of hypoxemia; any number of physiological stressors, such as infection, illness, surgery, or trauma; and intake of caffeine, nicotine, or alcohol

The nurse should report which assessment finding to the primary health care provider (PHCP) before initiating thrombolytic therapy in a client with pulmonary embolism?

Blood pressure of 198/110 mm Hg - Thrombolytic therapy is contraindicated in severe uncontrolled hypertension because of the risk of cerebral hemorrhage. Therefore, the nurse would report the results of the blood pressure to the PHCP before initiating therapy.

The nurse is caring for a client who had a resection of an abdominal aortic aneurysm yesterday. The client has an intravenous (IV) infusion at a rate of 150 mL/ hr, unchanged for the last 10 hours. The client's urine output for the last 3 hours has been 90, 50, and 28 mL (28 mL is most recent). The client's blood urea nitrogen level is 35 mg/dL (12.6 mmol/L), and the serum creati¬nine level is 1.8 mg/dL (159 mcmol/L), measured this morning. Which nursing action is the priority?

Call the primary health care provider (PHCP). - Following abdominal aortic aneurysm resection or repair, the nurse monitors the client for signs of acute kidney injury. Acute kidney injury can occur because often much blood is lost during the surgery and, depending on the aneurysm location, the renal arteries may be hypoperfused for a short period during surgery. Normal reference levels are BUN 10 to 20 mg/dL (3.6 to 7.1 mmol/L), and creatinine 0.6 to 1.2 mg/dL (53 to 106 mcmol/L) for males and 0.5 to 1.1 mg/dL (44 to 97 mcmol/L) for females. Continuing to monitor urine output or checking other parameters can wait. Urine output lower than 30 mL/hr is reported to the PHCP for urgent treatment

client is wearing a continuous cardiac monitor, which begins to sound its alarm. The nurse sees no electrocardiographic complexes on the screen. Which is the priority nursing action?

Check the client's status. - Sudden loss of electrocardiographic complexes indicates ventricular asystole or possibly electrode displacement. Accurate assessment of the client is necessary to determine the cause and identify the appropriate intervention. The remaining options are secondary to client assessment.

A client has experienced pulmonary embolism. The nurse should assess for which symptom, which is most commonly reported?

Chest pain that occurs suddenly - The most common initial symptom in pulmonary embolism is chest pain that is sudden in onset. The next most commonly reported symptom is dyspnea, which is accompanied by an increased respiratory rate. Other typical symptoms of pulmonary embolism include apprehension and restlessness, tachycardia, cough, and cyanosis.

A client with valvular heart disease who has a clot in the right atrium is receiving a heparin sodium infusion at 1000 units/hr and warfarin sodium 7.5 mg at 5:00 p.m. daily. The morning laboratory results are as follows: activated partial thromboplastin time (aPTT), 32 seconds; international normalized ratio (INR), 1.3. The nurse should take which action based on the client's laboratory results?

Collaborate with the PHCP to obtain a prescription to increase the heparin infusion and continue the warfarin sodium as prescribed - When a client is receiving warfarin for clot prevention due to atrial fibrillation, an INR of 2 to 3 is appropriate for most clients. Until the INR has achieved a therapeutic range, the client should be maintained on a continuous heparin infusion with the aPTT ranging between 60 and 80 seconds. Therefore, the nurse should collaborate with the HCP to obtain a prescription to increase the heparin infusion and to administer the warfarin as prescribed.

The nurse is assisting to defibrillate a client in ventricular fibrillation. After placing the pads on the client's chest and before discharging the device, which intervention is a priority?

Confirm that the rhythm is ventricular fibrillation - Until the defibrillator is attached and charged, the client is resuscitated by using cardiopulmonary resuscitation. Once the defibrillator has been attached, the electrocardiogram is checked to verify that the rhythm is ventricular fibrillation or pulseless ventricular tachycardia. Leads also are checked for any loose connections. A nitroglycerin patch, if present, is removed. The client does not have to be intubated to be defibrillated. The machine is not set to the synchronous mode because there is no underlying rhythm with which to synchronize.

The nurse is developing a plan of care for a client with varicose veins in whom skin breakdown occurred over the varicosities as a result of secondary infection. Which is a priority intervention?

Elevate the legs higher than the heart. - In the client with a venous disorder, the legs are elevated above the level of the heart to assist with the return of venous blood to the heart. Alcohol is very irritating and drying to tissues and should not be used in areas of skin breakdown. Option 4 specifies infrequent care intervals, so it is not the priority intervention.

The nurse is caring for a client who is on strict bed rest and creates a plan of care with goals related to the prevention of deep vein thrombosis and pulmonary emboli. Which nursing action is most helpful in preventing these disorders from developing?

Encouraging active range-of-motion exercises - Clients at greatest risk for deep vein thrombosis and pulmonary emboli are immobilized clients. Basic preventive measures include early ambulation, leg elevation, active leg exercises, elastic stockings, and intermittent pneumatic calf compression. Keeping the client well hydrated is essential because dehydration predisposes to clotting. A pillow under the knees may cause venous stasis. Heat should not be applied without a primary health care provider's prescription.

A client with atrial fibrillation who is receiving maintenance therapy of warfarin sodium has a prothrombin time (PT) of 35 seconds. On the basis of these laboratory values, the nurse anticipates which prescription?

Holding the next dose of warfarin - The normal PT is 11 to 12.5 seconds (conventional therapy and SI units). A therapeutic PT level is 1.5 to 2 times higher than the normal level. Because the value of 35 seconds is high, the nurse should anticipate that the client would not receive further doses at this time. Therefore, the prescriptions noted in the remaining options are incorrect.

The nurse is caring for a client with cardiac disease who has been placed on a cardiac monitor. The nurse notes that the client has developed atrial fibrillation and has a rapid ventricular rate of 150 beats/minute. The nurse should next assess the client for which finding?

Hypotension - The client with uncontrolled atrial fibrillation with a ventricular rate greater than 100 beats/minute is at risk for low cardiac output because of loss of atrial kick. The nurse assesses the client for palpitations, chest pain or discomfort, hypotension, pulse deficit, fatigue, weakness, dizziness, syncope, shortness of breath, and distended neck veins.

A client has frequent bursts of ventricular tachycardia on the cardiac monitor. What should the nurse be most concerned about with this dysrhythmia?

It can develop into ventricular fibrillation at any time. - Ventricular tachycardia is a life-threatening dysrhythmia that results from an irritable ectopic focus that takes over as the pacemaker for the heart. Ventricular tachycardia can deteriorate into ventricular fibrillation at any time. Clients frequently experience a feeling of impending doom. The low cardiac output that results can lead quickly to cerebral and myocardial ischemia. Ventricular tachycardia is treated with antidysrhythmic medications, cardioversion (if the client is awake), or defibrillation (loss of consciousness).

A client is receiving a continuous intravenous infusion of heparin sodium to treat deep vein thrombosis. The client's activated partial thromboplastin time (aPTT) is 65 seconds. The nurse anticipates that which action is needed?

Leaving the rate of the heparin infusion as is - The normal aPTT varies between 30 and 40 seconds (30 and 40 seconds), depending on the type of activator used in testing. The therapeutic dose of heparin for treatment of deep vein thrombosis is to keep the aPTT between 1.5 (45 to 60) and 2.5 (75 to 100) times normal. This means that the client's value should not be less than 45 seconds or greater than 100 seconds. Thus, the client's aPTT is within the therapeutic range and the dose should remain unchanged.

a client with a history of type 2 diabetes is admitted to the hospital with chest pain. The client is scheduled for a cardiac catheterization. Which medication would need to be withheld for 24 hours before the procedure and for 48 hours after the procedure?

Metformin - Metformin needs to be withheld 24 hours before and for 48 hours after cardiac catheterization because of the injection of contrast medium during the procedure. If the contrast medium affects kidney function, with metformin in the system the client would be at increased risk for lactic acidosis. The medications in the remaining options do not need to be withheld before and after cardiac catheterization.

The nurse is reviewing an electrocardiogram rhythm strip. The P waves and QRS complexes are regular. The PR interval is 0.16 seconds, and QRS complexes measure 0.06 seconds. The overall heart rate is 64 beats per minute. Which action should the nurse take?

Monitor for any rhythm change. - Normal sinus rhythm is defined as a regular rhythm, with an overall rate of 60 to 100 beats per minute. The PR and QRS measurements are normal, measuring between 0.12 and 0.20 seconds and 0.04 and 0.10 seconds, respectively. There are no irregularities in this rhythm currently, so there is no immediate need to check vital signs or laboratory results, or to notify the primary health care provider. Therefore, the nurse would continue to monitor the client for any rhythm change.

Prior to administering a client's daily dose of digoxin to treat heart failure, the nurse reviews the client's laboratory data and notes the following results: serum calcium, 9.8 mg/dL (2.45 mmol/L); serum magnesium, 1.0 mEq/L (0.4 mmol/L); serum potassium, 4.1 mEq/L (4.1 mmol/L); serum creatinine, 0.9 mg/dL (79.5 mcmol/L). Which result should alert the nurse that the client is at risk for digoxin toxicity?

Serum magnesium level - An increased risk of toxicity exists in clients with hypercalcemia, hypokalemia, hypomagnesemia, hypothyroidism, and impaired renal function. The calcium, creatinine, and potassium levels are all within normal limits. The normal range for magnesium is 1.8-2.6 mEq/L (0.74-1.07 mmol/L), and the results in the correct option are reflective of hypomagnesemia.

A client's electrocardiogram strip shows atrial and ventricular rates of 110 beats per minute. The PR interval is 0.14 seconds, the QRS complex measures 0.08 seconds, and the PP and RR intervals are regular. How should the nurse interpret this rhythm?

Sinus tachycardia - Sinus tachycardia has the characteristics of normal sinus rhythm, including a regular PP interval and normal-width PR and QRS intervals; however, the rate is the differentiating factor. In sinus tachycardia, the atrial and ventricular rates are greater than 100 beats per minute.

A client's electrocardiogram strip shows atrial and ventricular rates of 110 beats/minute. The PR interval is 0.14 seconds, the QRS complex measures 0.08 seconds, and the PP and RR intervals are regular. How should the nurse correctly interpret this rhythm?

Sinus tachycardia - Sinus tachycardia has the characteristics of normal sinus rhythm, including a regular PP interval and normal-width PR and QRS intervals; however, the rate is the differentiating factor. In sinus tachycardia, the atrial and ventricular rates are greater than 100 beats/minute.

The nurse is instructing a client with hypertension on the importance of choosing foods low in sodium. The nurse should teach the client to limit intake of which food?

Smoked salami - Smoked foods are high in sodium, which is noted in the correct option. The remaining options are fruits and vegetables, which are low in sodium.

A client with hypertension has been told to maintain a diet low in sodium. The nurse who is teaching this client about foods that are allowed should include which food item in a list provided to the client?

Summer squash - Foods that are lower in sodium include fruits and vegetables (summer squash) because they do not contain physiological saline. Highly processed or refined foods (tomato soup, instant oatmeal) are higher in sodium unless their food labels specifically state "low sodium." Saltwater fish and shellfish are high in sodium.

The nurse is assessing the neurovascular status of a client who returned to the surgical nursing unit 4 hours ago after undergoing aortoiliac bypass graft. The affected leg is warm, and the nurse notes redness and edema. The pedal pulse is palpable. How should the nurse interpret the client's neurovascular status?

The neurovascular status is normal because of increased blood flow through the leg. - An expected outcome of aortoiliac bypass graft surgery is warmth, redness, and edema in the surgical extremity because of increased blood flow. The remaining options are incorrect interpretations.

The nurse is providing instructions to a client with a diagnosis of hypertension regarding high-sodium items to be avoided. The nurse instructs the client to avoid consuming which item?

antacids - The sodium level can increase with the use of several types of products, including toothpaste and mouthwash; over-the-counter medications such as analgesics, antacids, laxatives, and sedatives; and softened water and mineral water. Clients are instructed to read labels for sodium content. Water that is bottled, distilled, deionized, or demineralized may be used for drinking and cooking. Fresh fruits and vegetables are low in sodium.