Chapter 24: Management of Patients with Structural, Infectious, and Inflammatory Cardiac Disorders PrepU Questions

Which would the nurse stress as a periodic lifelong necessity for a client managing infective endocarditis?

Antibiotic therapy The nurse informs the client that periodic antibiotic therapy is a lifelong necessity because the client will be vulnerable to diseases for the rest of his life. Antihypertensive therapy is not always prescribed. Limited activity is stressed. Potassium replacement is typical when combined with diuretic therapy.

During a teaching session, a client who is having a valvuloplasty tomorrow asks the nurse about the difference between a mechanical valve replacement and a tissue valve. What answer from the nurse is correct?

"A mechanical valve is thought to be more durable and so requires replacement less often." Mechanical valves are thought to be more durable than tissue valves and so require replacement less often. Tissue valves are less likely to generate blood clots and so long-term anticoagulation therapy is not required. Homografts (human valves) are not always available and are very expensive.

The nurse obtains a health history from a client with a prosthetic heart valve and new symptoms of infective endocarditis. Which question by the nurse is most appropriate to ask?

"Have you been to the dentist recently?" Invasive procedures, particularly those involving mucosal surfaces (e.g., those involving manipulation of gingival tissue or periapical regions of teeth), can cause a bacteremia, which rarely lasts more than 15 minutes. However, if a client has any anatomic cardiac defects or implanted cardiac devices (e.g., prosthetic heart valve, pacemaker, implantable cardioverter defibrillator), bacteremia can cause bacterial endocarditis.

A client who had a prosthetic valve replacement was taking warfarin to reduce the risk of postoperative thrombosis. The client visited the nurse at a clinic once a week. What INR level would alert the nurse to notify the health care provider?

3.8 Warfarin patients usually have individualized target international normalized ratios (INRs) between 2 to 3.5 to maintain adequate anticoagulation. Levels below 2 to 2.5 can result in insufficient anticoagulation and levels greater than 3.5 can result in dangerous and prolonged anticoagulation.

While assessing a patient with pericarditis, the nurse cannot auscultate a friction rub. Which action should the nurse implement?

Ask the patient to lean forward and listen again. The most characteristic sign of pericarditis is a creaky or scratchy friction rub heard most clearly at the left lower sternal border. Having the patient lean forward and to the left uses gravity to force the heart nearer to the chest wall, which allows the friction rub to be heard. These assessment data are not life-threatening and do not require a call to the health care provider. The nurse should try multiple times to auscultate the friction rub before deciding that the rub is gone. Chest tubes are not the treatment of choice for not hearing friction rubs.

A nurse is caring for a client who had an aortic balloon valvuloplasty. The nurse should inspect the surgical insertion site closely for which complication(s)?

Bleeding and infection Possible complications of an aortic balloon valvuloplasty include aortic regurgitation, emboli, ventricular perforation, rupture of the aortic valve annulus, ventricular dysrhythmia, mitral valve damage, infection, and bleeding from the catheter insertion sites.

During assessment of a client admitted for cardiomyopathy, the nurse notes the following symptoms: dyspnea on exertion, fatigue, fluid retention, and nausea. The initial appropriate nursing diagnosis is which of the following?

Decreased cardiac output A primary nursing diagnosis for cardiomyopathy is decreased cardiac output related to structural disorders caused by cardiomyopathy or to dysrhythmia from the disease process and medical treatments. Dyspnea on exertion, fatigue, and fluid retention are related to poor cardiac output. Nausea is related to poor perfusion of the gastrointestinal system. Autonomic dysreflexia is related to a spinal cord injury. Ineffective airway clearance relates to the inability to clear secretions from the airway, which is not an initial problem with cardiomyopathy. Disturbed sensory perception is related to specific senses and not to initial cardiomyopathy.

A client is admitted to the hospital with aortic stenosis. What assessment findings would indicate the development of left ventricular failure?

Dyspnea, orthopnea, pulmonary edema Signs and symptoms of progressive left ventricular failure include breathing difficulties, such as orthopnea, PND, and pulmonary edema. Distended jugular veins, pedal edema, and nausea are signs and symptoms of right sided heart failure.

A client is admitted to the hospital with possible acute pericarditis and pericardial effusion. The nurse knows to prepare the client for which diagnostic test to confirm the client's diagnosis?

Echocardiography Echocardiography is useful in detecting the presence of pericardial effusions associated with pericarditis. An echocardiogram may detect inflammation, pericardial effusion, tamponade, and heart failure. It may help confirm the diagnosis.

The diagnosis of aortic regurgitation (AR) is confirmed by which of the following?

Echocardiography Diagnosis is confirmed by echocardiography. Cardiac catheterization is not necessary in most patients with AR. Exercise stress testing will assess functional capacity and symptom response. A myocardial biopsy may be performed to analyze myocardial tissue cells in patients with cardiomyopathy.

A client reporting heart palpitations is diagnosed with atrial fibrillation caused by mitral valve prolapse. To relieve the symptoms, the nurse should teach the client which dietary intervention?

Eliminate caffeine and alcohol To minimize symptoms of mitral valve prolapse, the nurse should instruct the client to avoid caffeine and alcohol. The nurse encourages the client to read product labels, particularly on over-the-counter products such as cough medicine, because these products may contain alcohol, caffeine, ephedrine, and adrenaline, which may produce arrhythmias and other symptoms. The nurse also explores possible diet, activity, sleep, and other lifestyle factors that may correlate with symptoms.

A client is diagnosed with rheumatic endocarditis. What bacterium is the nurse aware causes this inflammatory response?

Group A, beta-hemolytic streptococcus Acute rheumatic fever, which occurs most often in school-age children, may develop after an episode of group A beta-hemolytic streptococcal pharyngitis (Chart 28-2). Clients with rheumatic fever may develop rheumatic heart disease as evidenced by a new heart murmur, cardiomegaly, pericarditis, and heart failure.

An adult client with a tentative diagnosis of infective endocarditis is admitted to an acute care facility. The medical history reveals diabetes mellitus, hypertension, and pernicious anemia. The client underwent an appendectomy 20 years earlier and an aortic valve replacement 2 years before this admission. What history finding is a major risk factor for infective endocarditis?

History of aortic valve replacement A heart valve prosthesis such as an aortic valve replacement is a major risk factor for infective endocarditis. Other risk factors include a history of heart disease (especially mitral valve prolapse), chronic debilitating disease, I.V. drug abuse, and immunosuppression. Although race, age, and a history of diabetes mellitus may predispose a person to cardiovascular disease, they aren't major risk factors for infective endocarditis.

In which type of cardiomyopathy does the heart muscle actually increase in size and mass weight, especially along the septum?

Hypertrophic Because of the structural changes, hypertrophic cardiomyopathy had also been called idiopathic hypertrophic subaortic stenosis (IHSS) or asymmetric septal hypertrophy (ASH). Restrictive cardiomyopathy is characterized by diastolic dysfunction caused by rigid ventricular walls that impair ventricular stretch and diastolic filling. Arrhythmogenic right ventricular cardiomyopathy (ARVC) occurs when the myocardium of the right ventricle is progressively infiltrated and replaced by fibrous scar and adipose tissue.

A client with a recent history of atrial fibrillation has been prescribed warfarin. What action will the nurse take to confirm safe dosing?

Review the client's international normalized ratio (INR). Warfarin doses are adjusted on the basis of the client's INR. Blood levels are not taken for the drug, and the client's heart rate is not the indicator of efficacy or safety.

The school nurse is providing care to a child with a sore throat. With any sign of throat infection, the nurse stresses which of the following?

Obtaining a throat culture When a child has a sore throat and symptoms of a possible infection occur, it is essential that a culture is obtained. A culture can identify group A beta-hemolytic streptococcal infection, which needs to be eliminated with use of an antibiotic. Warm, salt gargles; increasing fluids; and administering antiseptic lozenges are helpful for symptom control. Obtaining a throat culture is a priority.

The nurse is teaching a client about mitral stenosis. What are pathophysiologic events occurring in mitral stenosis? Select all that apply.

Pulmonary pressure increases. Diastole is shortened. Amount of time for forward flow is lessened. Mitral stenosis decreases blood flow from the left atrium to the left ventricle during diastole. When heart rate increases, diastole is shortened, and the amount of time for forward flow is lessened; cardiac output decreases and pulmonary pressure increases, with blood backing up from the left atrium into the pulmonary veins.

A nurse is obtaining a history from a new client in the cardiovascular clinic. When investigating for childhood diseases and disorders associated with structural heart disease, which finding should the nurse consider significant?

Rheumatic fever Childhood diseases and disorders associated with structural heart disease include rheumatic fever and severe streptococcal (not staphylococcal) infections. Croup — a severe upper airway inflammation and obstruction that typically strikes children ages 3 months to 3 years — may cause latent complications, such as ear infection and pneumonia. However, it doesn't affect heart structures. Likewise, medullary sponge kidney, characterized by dilation of the renal pyramids and formation of cavities, clefts, and cysts in the renal medulla, may eventually lead to hypertension but doesn't damage heart structures.

A client with a myocardial infarction develops acute mitral valve regurgitation. The nurse knows to assess for which manifestation that would indicate that the client is developing pulmonary congestion?

Shortness of breath Chronic mitral regurgitation is often asymptomatic, but acute mitral regurgitation (e.g., resulting from a myocardial infarction) usually manifests as severe congestive heart failure. Dyspnea, fatigue, and weakness are the most common symptoms. Palpitations, shortness of breath upon exertion, and cough from pulmonary congestion also occur. A loud, blowing murmur often is heard throughout ventricular systole at the apex of the heart. Hypertension may develop when reduced cardiac output triggers the renin-angiotensin-aldosterone cycle. Tachycardia is a compensatory mechanism when stroke volume decreases.

A nurse is caring for a young female adult client diagnosed with atrial fibrillation who has just had a mitral valve replacement. The client is being discharged with prescribed warfarin. The client mentions to the nurse that she relies on the rhythm method for birth control. What education will be a priority for the nurse to provide to this client?

The high risk for complications if she becomes pregnant while taking warfarin Women of childbearing age should not take warfarin (pregnancy X category) if they plan to become pregnant. There is danger to the placenta and risk for the mother to bleed. The fetus may also be affected. This client should practice a more reliable method of birth control. The rhythm method for birth control is not always accurate. The symptoms of worsening tachycardia are important, but do not correspond to the warfarin therapy. Limiting green leafy vegetables is important with warfarin therapy, but risk for fetal harm is more important.

A nurse is teaching a client about mitral stenosis. What is the key teaching point regarding the disruption to the normal flow of blood through the heart due to mitral stenosis?

The increased resistance of a narrowed orifice between the left atrium and the left ventricle. Left atrial pressure increases because of the slowed blood flow into the LV through the narrowed orifice. The left atrium dilates and hypertrophies because of the increased blood volume. Pulmonary venous pressure rises, and the circulation becomes congested. As a result, the RV and right atrium become enlarged. Eventually, the ventricle fails.

A nurse is caring for a client with pericarditis and auscultates a pericardial friction rub. What action does the nurse ask the client to do to distinguish a pericardial friction rub from a pleural friction rub?

The nurse asks the client to hold the breath during auscultation. A pericardial friction rub occurs when the pericardial surfaces lose their lubricating fluid as a result of inflammation. The audible rub on auscultation is synchronous with the heartbeat. To distinguish between a pleural rub and a pericardial rub, the client should hold the breath. The pericardial rub will continue. Length of auscultation and standing would not assist in distinguishing one kind of rub from the other.

The nurse is teaching a client with cardiomyopathy. Which statement is a valid teaching point?

The treatments include medications, medical devices, surgery, or transplantation. Treatments for clients with cardiomyopathy include medications, medical devices such as pacemakers, internal defibrillators, surgery or transplantation. The disease is not curable or reversible. Clients with cardiomyopathy do not need to live in a skilled facility. The main goal for clients with cardiomyopathy is to improve heart function.

The nurse understands that which of the following medications will be administered to the client for 6 to 12 weeks following prosthetic porcine valve surgery?

Warfarin To reduce the risk of thrombosis in patients with porcine or bovine tissue valves, warfarin is required for 6 to 12 weeks, followed by aspirin therapy. Furosemide would not be given for 6 to 12 weeks following this type of surgery. Digoxin may be used for the treatment of arrhythmias, but not just for 6 to 12 weeks.

A client is diagnosed with pericarditis. What symptom will be the nurse's priority for treatment?

acute pain Pain is the primary symptom of the client with pericarditis. Pain relief and the absence of complications are two major nursing goals. The client may have anxiety, fatigue, or denial, but these symptoms are not the nurse's priority for care.

A nurse reviewing a client's echocardiogram report reads the following statements: "The heart muscle is asymmetrically thickened and the overall size and mass are increased, especially along the septum. The ventricular walls are thickened, reducing the size of the ventricular cavities. Several areas of the myocardium show evidence of scarring." The nurse knows these manifestations are indicative of which type of cardiomyopathy?

hypertrophic In hypertrophic cardiomyopathy (HCM), the heart muscle asymmetrically increases in size and mass, especially along the septum. It often affects nonadjacent areas of the ventricle. The increased thickness of the heart muscle reduces the size of the ventricular cavities and causes the ventricles to take a longer time to relax after systole. The coronary arteriole walls are also thickened, decreasing the internal diameter of the arterioles. The narrow arterioles restrict the blood supply to the myocardium, causing numerous small areas of ischemia and necrosis. The necrotic areas of the myocardium ultimately fibrose and scar, further impeding ventricular contraction. Because of the structural changes involved, HCM has also been called idiopathic hypertrophic subaortic stenosis (IHSS) or asymmetric septal hypertrophy (ASH). Dilated cardiomyopathy (DCM) is distinguished by significant dilation of the ventricles without simultaneous hypertrophy (increased muscle wall thickness) and systolic dysfunction. The ventricles have elevated systolic and diastolic volumes but a decreased ejection fraction. Restrictive (or constrictive) cardiomyopathy (RCM) is characterized by diastolic dysfunction caused by rigid ventricular walls that impair ventricular stretch and diastolic filling. Arrhythmogenic right ventricular cardiomyopathy (ARVC) occurs when the myocardium of the right ventricle is progressively infiltrated and replaced by fibrous scar and adipose tissue.

The nurse completes an assessment of a client admitted with pericarditis. What client symptom will the nurse correlate with the diagnosis of pericarditis?

reports of constant chest pain The most characteristic symptom of pericarditis is chest pain. The pain or discomfort usually remains fairly constant, but it may worsen with deep inspiration and when lying down or turning. Other signs may include a mild fever, increased WBC count, anemia, and an elevated ESR or C-reactive protein level. Dyspnea and other signs and symptoms of heart failure may occur.