Abstract
The antihypertensive effect of the calcium-antagonist verapamil was investigated in two groups of patients, adult hypertensives (AH, less than 65 years of age) and elderly hypertensives (EH, greater than 65 years of age), who were treated with 240 mg p.o. sustained-release (SR) verapamil for 4 months. Arterial blood pressure was significantly reduced in both groups: the responders' rate was 65% in the AH group and 82% in the EG group. The heart rate was slightly but not significantly reduced. An improvement in cardiac haemodynamics was observed [cardiac index (CI), from 3.00 +/- 0.51 to 3.25 +/- 0.83 ml min-1 m-2 in AH and from 2.35 +/- 1.08 to 3.04 +/- 0.86 ml min-1 m-2 in EG]. We also evaluated the plasma concentrations of atrial natriuretic peptide (ANP) before and after treatment; ANP levels increased significantly only in the EH group. No serious side effects occurred. In conclusion, verapamil SR provided effective and well-tolerated antihypertensive treatment in both adult and elderly patients.
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