Acute and Subacute Haemodynamic Effects of Enalapril

Area of Science:

• Cardiology
• Pharmacology

Background:

• Primary hypertension is a significant cardiovascular risk factor.
• Effective antihypertensive agents are crucial for managing blood pressure and preventing complications.

Purpose of the Study:

• To evaluate the efficacy and hemodynamic effects of enalapril in patients with primary hypertension.
• To assess the impact of enalapril on cardiac function and patient tolerance.

Main Methods:

• A six-week open-label study involving 15 patients with primary hypertension.
• Non-invasive cardiovascular monitoring (ECG, phonocardiogram, impedance cardiography) before and after enalapril administration.
• Assessment of systolic time intervals to evaluate left ventricular function.

Main Results:

• Enalapril demonstrated potent antihypertensive effects, with significant blood pressure reduction observed within four hours of the first dose.
• Reduced total peripheral resistance was the primary mechanism for blood pressure lowering.
• Long-term enalapril treatment led to increased cardiac output, primarily due to enhanced stroke volume.
• Significant improvement in left ventricular systolic function was noted, while diastolic function remained unchanged.
• Enalapril was well-tolerated by patients, with no significant side effects reported.

Conclusions:

• Enalapril is an effective antihypertensive medication for primary hypertension.
• The drug improves cardiac performance and left ventricular systolic function.
• Enalapril offers a favorable safety profile and good patient tolerance.