A disproportionate thickening of the interventricular septum is the hallmark of which form of cardiomyopathy?
Dilated
Dystrophic
Hypertrophic
Restrictive
The Correct Answer is C
A. Dilated: Dilated cardiomyopathy is characterized by an enlarged heart with decreased contractility and thinning of the ventricular walls. It does not involve disproportionate thickening of the interventricular septum.
B. Dystrophic: Dystrophic cardiomyopathy refers to muscle degeneration due to underlying muscular dystrophies. It does not specifically describe the thickening of the interventricular septum and is not a primary classification of cardiomyopathy.
C. Hypertrophic: Hypertrophic cardiomyopathy is marked by a disproportionate thickening of the interventricular septum, leading to impaired diastolic filling and potential obstruction of blood flow out of the left ventricle. This characteristic thickening is a hallmark of this condition.
D. Restrictive: Restrictive cardiomyopathy involves stiffening of the heart muscle, which impairs filling during diastole but does not specifically feature disproportionate thickening of the interventricular septum. Instead, it may present with normal or slightly thickened walls but with decreased compliance.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Thoracotomy: Thoracotomy involves opening the chest cavity to access the heart and lungs; this surgical approach is not the first-line treatment for pericardial effusion and is more invasive than necessary, potentially leading to increased recovery time and complications.
B. Pericardiocentesis: Pericardiocentesis involves inserting a needle into the pericardial space to remove excess fluid; this procedure is a common and effective treatment for symptomatic large pericardial effusions, providing rapid relief of symptoms such as dyspnea and chest pain while also allowing for diagnostic evaluation of the fluid.
C. Heart catheterization: Heart catheterization involves a diagnostic procedure to assess heart function and blood flow through the coronary arteries; while it provides valuable information regarding cardiac conditions, it is not indicated for treating pericardial effusion and does not address the underlying fluid accumulation.
D. Pericardiectomy: Pericardiectomy involves removing part or all of the pericardium; this surgical procedure is typically reserved for chronic cases or constrictive pericarditis, as it is more invasive and not the immediate treatment option for an acute pericardial effusion, where less invasive options are preferred.
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.
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