The correlation of changes in systolic blood pressure with regional anatomical regression of hypertensive left ventricular hypertrophy in patients on chronic antihypertensive therapy (greater than 1 year): alpha-methyldopa compared to propranolol.

Twenty patients with mild to moderate hypertension and evidence of left ventricular hypertrophy (relative wall thickness greater than or equal to 0.45), who previously had not received either alpha-methyldopa or propranolol, were allocated at random to treatment with one or other of these drugs as monotherapy after a 2-week baseline period on no medication. Dosage was titrated until normotension was attained and patients were then maintained on this treatment for a year. Analysis of blood pressure measurements and echocardiograms taken before and during maintenance therapy showed that there were significantly correlated changes in systolic blood pressure and heart rate with left ventricular cavity and regional wall changes during chronic drug administration. In the alpha-methyldopa group there were significant correlations between changes in erect and supine systolic blood pressure and the posterior wall index, and in erect systolic blood pressure and left ventricular mass. In the propranolol group, there were significant correlations between changes in supine systolic blood pressure and interventricular septal thickness, and in erect heart rate and supine systolic blood pressure with the percentage change in internal diameter of the left ventricle. It is suggested that these observations may have important therapeutic implications for hypertensive patients with documented left ventricular hypertrophy.