[Relationship between regression of hypertensive left ventricular hypertrophy and improvement of coronary flow...

Area of Science:

• Cardiology
• Hypertension Research
• Medical Imaging

Background:

• Hypertensive left ventricular hypertrophy (LVH) is a common complication of essential hypertension.
• LVH is associated with impaired coronary flow reserve (CFR), increasing cardiovascular risk.
• Understanding the impact of antihypertensive treatments on LVH regression and CFR is crucial.

Purpose of the Study:

• To investigate the relationship between the regression of hypertensive left ventricular hypertrophy (LVH) and alterations in coronary flow reserve (CFR).
• To evaluate the effects of ramipril, losartan, and their combination on LVH and CFR in hypertensive patients.

Main Methods:

• Ninety-six hypertensive patients with LVH were randomized into three groups: ramipril, losartan, or combination therapy.
• Left ventricular mass (LVM) was assessed using three-dimensional echocardiography.
• Coronary flow reserve (CFR) was measured by transesophageal echocardiography, calculating the ratio of hyperemic to rest flow velocity (Dipyridamole/Rest), with indices corrected for LVM.

Main Results:

• All treatment groups showed significant reductions in systolic blood pressure, diastolic blood pressure, and LVM after six months.
• Coronary flow reserve indices, specifically the diastolic flow velocity integral corrected by LVM (D/R DVi(C)), significantly increased in all groups compared to baseline.
• The improvement in D/R DVi(C) positively correlated with the regression of LVM but not with the decrease in blood pressure.

Conclusions:

• Ramipril, losartan, and combination therapy effectively reduce blood pressure and LVH in hypertensive patients.
• These treatments also lead to significant improvements in CFR, particularly when corrected for LVM.
• The regression of hypertensive LVH is associated with an improvement in CFR, highlighting a potential therapeutic target.