to examine the effects of chronic oral therapy with verapamil , 120 mg three times a day , and nifedipine , 20 mg four times daily , on left ventricular ejection fraction and regional wall motion at rest and exercise , 10 patients with chronic stable angina pectoris underwent serial rest and exercise radionuclide angiography .
C0028066
nifedipine
C0340288
chronic stable angina