dysrhythmias

123.) A nurse is planning to administer amlodipine (Norvasc) to a client. The nurse plans to check which of the following before giving the medication? 1. Respiratory rate 2. Blood pressure and heart rate 3. Heart rate and respiratory rate 4. Level of consciousness and blood pressure

2. Blood pressure and heart rate Amlodipine is a calcium channel blocker. This medication decreases the rate and force of cardiac contraction. Before administering a calcium channel blocking agent, the nurse should check the blood pressure and heart rate, which could both decrease in response to the action of this medication. This action will help to prevent or identify early problems related to decreased cardiac contractility, heart rate, and conduction. *amlodipine is a calcium channel blocker, and this group of medications decreases the rate and force of cardiac contraction. This in turn lowers the pulse rate and blood pressure.*

In teaching clients at risk for bradydysrhythmias, what information does the nurse include? a. "Avoid potassium-containing foods." b. "Stop smoking and avoid caffeine." c. "Take nitroglycerin for a slow heartbeat." d. "Use a stool softener."

Answer: "Use a stool softener." Rationale: Clients at risk for bradydysrhythmias should avoid bearing down or straining during a bowel movement; the Valsalva maneuver can cause bradycardia. Taking a stool softener helps to prevent this.

A patient in asystole is likely to receive which of the following drug treatments? a. Atropine and epinephrine b. Lidocaine and amiodarone c. Digoxin and procainamide d. β-Adrenergic blockers and dopamine

Answer: Atropine and epinephrine Rationale: Normally the patient in asystole cannot be successfully resuscitated. However, administration of atropine and epinephrine may prompt the return of depolarization and ventricular contraction.

The nurse is caring for a client on a telemetry unit with a regular heart rhythm and rate of 60; a P wave precedes each QRS complex, and the PR interval is 0.24 second. Additional vital signs are as follows: blood pressure 118/68, respiratory rate 16, and temperature 98.8° F. The following medications are available on the medication record. What action should the nurse take? a. Administer atropine. b. Administer digoxin. c. Administer clonidine. d. Continue to monitor.

Answer: Continue to monitor. Rationale: The client is displaying sinus rhythm with first-degree atrioventicular heart block; this is usually asymptomatic and does not require treatment. Atropine is used in emergency treatment of symptomatic bradycardia. This client has normal vital signs. Digoxin is used in the treatment of atrial fibrillation, which is, by definition, an irregular rhythm. Clonidine is used in the treatment of hypertension; a side effect is bradycardia.

The nurse teaches a client with new-onset atrial fibrillation that risk factors for this dysrhythmia may include which? Select all that apply. a. Use of beta-adrenergic blockers b. Excessive alcohol use c. Advancing age d. High blood pressure e. Palpitations Answer: Excessive alcohol use; Advancing age; High blood pressure Rationale: Excessive alcohol use may cause atrial fibrillation. Atrial fibrillation occurs more frequently in older people. Hypertension is a risk factor in the development of atrial fibrillation.

Answer: Excessive alcohol use; Advancing age; High blood pressure Rationale: Excessive alcohol use may cause atrial fibrillation. Atrial fibrillation occurs more frequently in older people. Hypertension is a risk factor in the development of atrial fibrillation.`

The nurse is caring for a client with acute coronary syndrome (ACS) and atrial fibrillation who has a new prescription for metoprolol (Lopressor). Which monitoring is essential when administering the medication? a. ST segment b. Heart rate c. Troponin d. Myoglobin

Answer: Heart rate Rationale: The effects of metoprolol are to decrease heart rate, blood pressure, and myocardial oxygen demand. ST segment elevation is consistent with MI; it does not address monitoring of metoprolol. Elevation in troponin is consistent with a diagnosis of MI but does not address needed monitoring for metoprolol. Elevation in myoglobin is consistent with myocardial injury in ACS but does not address needed monitoring related to metoprolol.

The nurse is caring for a client with atrial fibrillation. In addition to an antidysrhythmic, what medication does the nurse plan to administer? a. Heparin b. Atropine c. Dobutamine d. Magnesium sulfate

Answer: Heparin Rationale: Clients with atrial fibrillation are prone to blood pooling in the atrium, clotting, then embolizing. Heparin is used to prevent thrombus development in the atrium and the consequence of embolization (i.e., stroke).

The nurse administers amiodarone (Cordarone) to a client with ventricular tachycardia. Which monitoring by the nurse is necessary with this drug? Select all that apply. a. Respiratory rate b. QT interval c. Heart rate and rhythm d. Magnesium level e. Urine output

Answer: QT interval; Heart rate and rhythm; Magnesium level Rationale: Amiodarone causes prolongation of the QT interval, which can precipitate dysrhythmia. Antidysrhythmic medications cause changes in cardiac rhythm and rate; therefore monitoring of heart rate and rhythm is needed.Electrolyte depletion, specifically potassium and magnesium, may predispose to further dysrhythmia. Although it is always important to monitor vital signs and urine output, these assessments are not specific to amiodarone.

Which information would cause the nurse to withhold digoxin in the client with atrial fibrillation and heart failure? a. The client has sinus tachycardia with a rate of 102. b. The cardiac monitor shows atrial fibrillation with a heart rate of 98. c. The client has a creatinine level of 1.0 mg/dL. d. The digoxin level is 2.8 mg/dL.

Answer: The digoxin level is 2.8 mg/dL. Rationale: The therapeutic range for digoxin is 0.8 to 2.0 ng/mL; hold the medication because this client has digoxin toxicity.

How does the nurse recognize that atropine has produced a positive outcome for the client with bradycardia? a. Client states he is dizzy and weak. b. The nurse notes dyspnea. c. The client has a heart rate of 42. d. The monitor shows sinus rhythm

d. The monitor shows sinus rhythm