Preserved ventricular pump function after a marked reduction of left ventricular mass.

Area of Science:

• Cardiology
• Pharmacology
• Hypertension Research

Background:

• Antihypertensive drugs like ACE inhibitors and beta-blockers reduce ventricular hypertrophy.
• Limited data exists on the long-term effects and time course of combination therapy for hypertension-induced cardiac remodeling.

Purpose of the Study:

• To assess the long-term impact of combined angiotensin-converting enzyme inhibitor and beta-blocker therapy on arterial pressure and left ventricular mass.
• To investigate the relationship between blood pressure reduction and left ventricular mass changes during treatment.

Main Methods:

• Twenty-one patients with essential hypertension received daily low-dose atenolol (50 mg) and enalapril (10 mg) for 39 months.
• Echocardiography was used to measure cardiovascular parameters before treatment and at 6 and 39 months.

Main Results:

• Combination therapy significantly reduced resting (161/108 to 130/86 mm Hg) and exercise (192/112 to 167/95 mm Hg) arterial pressure.
• Significant decreases in interventricular septal thickness (28%), posterior wall thickness (29%), and left ventricular mass index (40%) were observed after 39 months.
• Blood pressure reductions were immediate, while left ventricular mass reduction was gradual and continuous over the treatment period.

Conclusions:

• Long-term atenolol and enalapril combination therapy effectively reduces arterial pressure and left ventricular mass in hypertensive patients.
• Left ventricular mass reduction is a gradual process that continues throughout long-term treatment.
• Despite significant reductions in left ventricular mass, cardiac pump function was well-preserved.