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The effects of antihypertensive treatment on regression of left ventricular hypertrophy and on left ventricular systolic and diastolic function were investigated echocardiographically in 13 untreated patients with mild hypertension (group I) and 16 untreated patients with moderate to severe hypertension (group II). The left ventricular mass index, left ventricular wall thickness, end-systolic left ventricular wall stress, and diastolic filling indexes before treatment were significantly higher in group II than in group I (p &lt; 0.01). The blood pressure of both groups decreased significantly after antihypertensive treatment (mean duration of follow-up, 1.8 +/- 0.3 yr in group I and 2.0 +/- 0.4 yr in group II) (p &lt; 0.01). The left ventricular mass index did not change in group I, whereas it decreased significantly in group II (p &lt; 0.01). The relation between fractional shortening and end-systolic wall stress was similar in both groups before treatment and was unaltered by treatment in either group. After treatment, peak velocity in early diastole (E) significantly increased in both groups; however, peak velocity in late diastole (A) did not decrease in either group. The A/E ratio was significantly decreased in both groups and was significantly higher in group II than in group I (p &lt; 0.01). In conclusion, the results suggest that intrinsic contractility may not be affected by left ventricular hypertrophy or regression of left ventricular hypertrophy. A/E ratio decreased after antihypertensive treatment in patients with mild hypertension mainly because of a decrease in blood pressure.

Left Ventricular Systolic and Diastolic Function and Mass before and after Antihypertensive Treatment in Patients with Essential Hypertension.