This event causes irreversible damage to the heart muscle:
Myocardial infarction
Myocardial stunning
Stable angina
Unstable angina
The Correct Answer is A
A. Myocardial infarction: Myocardial infarction involves the irreversible damage to the heart muscle due to prolonged ischemia, typically resulting from the occlusion of a coronary artery. The lack of oxygen and nutrients leads to cell death in the affected area of the heart, causing permanent damage.
B. Myocardial stunning: Myocardial stunning refers to a temporary reduction in the heart's function following reperfusion after a period of ischemia. The heart muscle may regain function over time, and this condition does not cause irreversible damage.
C. Stable angina: Stable angina is characterized by transient chest pain due to reversible ischemia, usually triggered by physical exertion or stress. The ischemic episodes do not lead to irreversible damage to the heart muscle, as blood flow is restored when the trigger is removed.
D. Unstable angina: Unstable angina involves episodes of chest pain that occur at rest or with minimal exertion and may signal an impending myocardial infarction. While it indicates a high risk of myocardial infarction, it does not cause irreversible damage to the heart muscle itself unless it progresses to an infarction.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Carotid wall thinness: Carotid wall thinness is not considered a nontraditional risk factor for coronary artery disease (CAD). Traditional risk factors for CAD include age, gender, hypertension, hyperlipidemia, and smoking, while carotid wall thickness (rather than thinness) is often used as a marker for atherosclerosis and cardiovascular risk.
B. Chronic kidney disease: Chronic kidney disease (CKD) is recognized as a nontraditional risk factor for coronary artery disease. It is associated with increased cardiovascular risk due to factors like inflammation, mineral metabolism disorders, and increased vascular stiffness.
C. Coronary artery calcification: Coronary artery calcification is considered a nontraditional risk factor for CAD. It reflects the presence of atherosclerosis and is associated with an increased risk of cardiovascular events.
D. Markers of inflammation, ischemia, and thrombosis: Markers of inflammation (such as C-reactive protein), ischemia, and thrombosis (such as fibrinogen and D-dimer) are nontraditional risk factors for coronary artery disease. Elevated levels of these markers indicate increased cardiovascular risk and are used in risk stratification.
Correct Answer is D
Explanation
A. Left heart failure: COPD primarily affects the lungs and increases pulmonary vascular resistance, leading to right-sided heart strain rather than left heart failure. Left heart failure is more commonly associated with conditions such as hypertension, myocardial infarction, and valvular diseases, which impair the heart’s ability to pump blood systemically.
B. Restrictive cardiomyopathy: Restrictive cardiomyopathy is a condition where the heart muscle becomes stiff and loses its ability to relax and fill properly, often due to infiltrative diseases such as amyloidosis or sarcoidosis. COPD does not directly lead to restrictive cardiomyopathy, as its primary cardiovascular complication is increased pulmonary resistance causing right heart strain.
C. Hypertrophic cardiomyopathy: Hypertrophic cardiomyopathy is characterized by abnormal thickening of the heart muscle, usually due to genetic mutations. It primarily affects the left ventricle and impairs diastolic filling. COPD does not cause hypertrophic cardiomyopathy, as its cardiovascular effects are due to pulmonary hypertension and right ventricular overload rather than structural abnormalities of the myocardium.
D. Right heart failure: Chronic COPD leads to persistent pulmonary hypertension due to hypoxic vasoconstriction and remodeling of pulmonary vessels. This increased pulmonary vascular resistance forces the right ventricle to work harder to pump blood into the lungs, leading to right ventricular hypertrophy and eventual right heart failure, also known as cor pulmonale. Symptoms include peripheral edema, jugular vein distention, and hepatomegaly due to systemic venous congestion.
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