Comparison of coronary vasomotor responses to nifedipine in syndrome X and in Prinzmetal's angina pectoris

To test whether calcium channel blockade plays a similar role in the coronary vasomotion of patients with syndrome X (n = 29) and patients with Prinzmetal's angina pectoris (n = 12), quantitative angiography was used to evaluate the effect of nifedipine (10 mg, sublingually) on the lumen diamet...

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