Pharmacotherapeutic effects of antihypertensive agents on myocardium and coronary arteries in hypertension

Area of Science:

• Cardiology
• Hypertension Research
• Cardiac Physiology

Background:

• Hypertensive left ventricular hypertrophy involves myocyte growth, fibrosis, and microcirculation changes.
• This leads to diastolic dysfunction and reduced coronary flow reserve, even with normal epicardial arteries.
• Effective treatment must address structural changes and improve coronary function alongside blood pressure control.

Purpose of the Study:

• To evaluate antihypertensive treatments for reversing cardiac remodeling in hypertensive left ventricular hypertrophy.
• To determine which drug classes effectively restore myocardial structure and coronary flow reserve.
• To understand the mechanisms by which certain antihypertensives impact cardiac hypertrophy and fibrosis.

Main Methods:

• Review of clinical studies on long-term antihypertensive therapy.
• Analysis of drug effects on myocyte hypertrophy, interstitial fibrosis, and coronary microcirculation.
• Comparison of efficacy between ACE inhibitors, calcium-channel blockers, beta-blockers, vasodilators, and diuretics.

Main Results:

• Long-term treatment with ACE inhibitors, calcium-channel blockers, and beta-blockers effectively reverses hypertensive hypertrophy.
• Vasodilators and diuretics were less effective, potentially due to stimulating factors that promote hypertrophy.
• ACE inhibitors show promise in reversing interstitial fibrosis, linked to angiotensin II's role in fibroblast growth.
• Antihypertensive therapy can improve impaired coronary vasodilator reserve.

Conclusions:

• Antihypertensive strategies should prioritize reversing cardiac remodeling, including myocardial structure and coronary microcirculation repair.
• Drugs like ACE inhibitors are crucial for addressing fibrosis and improving coronary function.
• Treatment choice should consider the impact on cardiac structure and function, not solely blood pressure reduction.