Comparison between the effects of urapidil and methyldopa on left ventricular hypertrophy and haemodynamics in humans.

In a randomised double-blind study the effects on left ventricular mass (LV mass) and cardiac haemodynamics of urapidil, an antihypertensive agent with a vascular postsynaptic alpha 1-blocking action and a central antihypertensive effect, were compared with those of methyldopa in 29 patients with essential hypertension. During a 3-month period, urapidil was initially given at 120 mg/day and increased to 180 mg/day if a satisfactory antihypertensive response was not achieved. Methyldopa was started at 100 mg/day and increased to 1500 mg/day if an adequate blood pressure response was not achieved. Echocardiographic measurements were obtained at baseline and after 12 weeks' active treatment. The frequency rates of responders (DBP less than 95 mm Hg) on urapidil and methyldopa were 54% and 62%, respectively, after 12 weeks. In the group as a whole there was a nonsignificant tendency for decreased LV mass on both active drugs. However, the haemodynamic changes were difficult to interpret because of baseline differences between the 2 treatment groups.