A New Water‐soluble, Selective β‐Blocker with Intrinsic Sympathomimetic Activity (ICI 141.292) in Angina Pectoris

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Abstract
In a placebo-controlled, randomized double-blind study the effect of ICI 141.292(.beta.1-selective .beta.-blocker with intrinsic sympathomimetic activity=ISA) was studied in 11 patients with severe angina pectoris. The doses used were 100, 200 and 300 mg once daily. The 24-hour heart rate was significantly reduced by all regimens, and the Holter-monitoring pattern indicated the presence of ISA-effect at least 20 hours after the 300-mg dose. Maximal heart rate and blood pressure were significantly reduced and exercise duration increased during a symptom-limited bicycle exercise test on 200 and 300 mg, but not on 100 mg daily. Resting heart rate and blood pressure were uninfluenced on all regimens. ICI 141.292 is an effective agent in patients with severe angina pectoris. The response pattern suggests the presence of clinically relevant ISA.