Evaluation of regression of left ventricular hypertrophy in hypertensive patients treated with captopril as assessed by magnetic resonance imaging.

Magnetic resonance imaging (MRI) was used to assess left ventricular mass (LVM) in 20 mild to moderate essential hypertensive patients with left ventricular hypertrophy (LVH) (LVM > 120 g/m2), treated with captopril alone or combined with hydrochlorothiazide. MRI examination was performed at the beginning (T0) and after 3 months (T3) of active treatment, by using a Philips Gyroscan S15 superconducting system, operating at 1.5 Tesla. We used a multislice-multiphase spin-echo sequence on the short-axis and transverse plane (TE = 30 ms; TR = 80-90% RR). End-diastolic thickness of interventricular septum (IVST) and lateral wall (LWT) were measured. LVM was calculated according to Simpson's rule. The results were: IVST 12.2 mm +/- 0.7 vs 10.9 mm +/- 0.5 (p < 0.001); LWT 11.5 mm +/- 0.9 vs 10.5 mm +/- 0.9 (p < 0.001); LVM 160 (g/m2) +/- 5.5 vs 138.4 g/m2 +/- 6 (p < 0.001), at T0 and T3, respectively. Our study demonstrates a significant regression of LVH in hypertensive patients after 3 months of treatment with captopril and a high accuracy of MRI as a noninvasive technique of measuring the LVM reduction.