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Chapter 49. Alcohol Septal Ablation in Drug-Refractory Obstructive Hypertrophic Cardiomyopathy
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What are the prevalence of hypertrophic cardiomyopathy (HCM) in the general population and the number of Americans affected?
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A. 1 in 10,000; 35,000 Americans affected
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B. 1 in 5000; 70,000 Americans affected
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C. 1 in 1000; 350,000 Americans affected
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D. 1 in 500; 700,000 Americans affected
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Which statement most accurately characterizes the occurrence of left ventricular outflow tract (LVOT) obstruction (gradient >30 mm Hg) in patients with HCM?
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A. 9 in 10 have resting or provoked obstruction
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B. 6 in 10 have resting or provoked obstruction
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C. 3 in 10 have resting or provoked obstruction
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D. 1 in 10 have resting or provoked obstruction
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What is the most useful method of confirming a diagnosis of HCM?
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E. Magnetic resonance imaging
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Which statement most accurately characterizes the comparison of surgical myectomy and alcohol septal ablation (ASA) in treatment of patients with drug-refractory symptoms and obstruction?
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A. Higher in-hospital mortality with myectomy; similar 1-year mortality
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B. Similar in-hospital and 1-year mortality
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C. Higher in-hospital and 1-year mortality with ASA
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D. Higher in-hospital and 1-year mortality with myectomy
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Which of the following most accurately describes outcomes of ASA?
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A. Right bundle branch block in a majority
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B. Left bundle branch block in one-third of patients
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C. Transient complete heart block in 70%
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D. Transient complete heart block in 20%
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