Abstract

Amlodipine, a dihydropyritine calcium antagonist has been examined on the rhythmic activity of isolated human coronary arteries. Amlodipine inhibited both the spontaneous rhythmic activity and the rhythmic activity evoked by prostaglandin 172a and endothein in isolated human coronary arteries. It also inhibited the contraction evoked by potassium depolarization. The action of amlodipine was characterized by slow onset and voltage dependency.

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