to examine the effects of propranolol and nifedipine on exercise-induced attack in patients with variant angina , exercise 201tl myocardial scintigraphy with quantitative analysis by emission-computed tomography was performed in 20 patients with variant angina after oral propranolol ( 80 mg ) , nifedipine ( 20 mg ) , and placebo .
C0002963
variant angina
C0028066
nifedipine