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[Vascular changes in essential hypertension after treatment with enalapril]
Insights
Enalapril treatment significantly reduced vascular resistance and improved blood flow in patients with essential hypertension. This study highlights the effectiveness of angiotensin-converting enzyme (ACE) inhibitors in managing hypertension.
Area of Science:
- Cardiovascular Medicine
- Pharmacology
Background:
- Essential hypertension is a widespread condition characterized by elevated blood pressure.
- Understanding the mechanisms and effective treatments for hypertension is crucial for public health.
Purpose of the Study:
- To investigate the effects of enalapril on cardiovascular parameters in patients with essential hypertension.
- To compare the efficacy of enalapril with placebo and assess differences between hypertensive and normotensive individuals.
Main Methods:
- A four-week study involving patients with essential hypertension and healthy controls.
- Utilized clinical examinations, ergometry, echocardiography, and occlusion plethysmography.
- Measured serum levels of adrenaline, noradrenaline, renin, cyclic adenosine monophosphate (cAMP), and beta receptors before and after treatment.
Main Results:
- Enalapril administration led to a statistically significant reduction in peripheral vascular resistance and increased blood flow at rest.
- Significant differences were observed between the enalapril group and the placebo group.
- Distinct differences were noted when comparing hypertonic and normotonic subjects.
Conclusions:
- Enalapril effectively reduces peripheral vascular resistance and enhances blood flow in patients with essential hypertension.
- Angiotensin-converting enzyme (ACE) inhibitors demonstrate a positive impact on vascular function in hypertensive individuals.
Abstract:
A group of patients with essential hypertension and healthy subjects from the same work place were investigated for a period of four weeks and were subjected, in addition to a basic clinical medical examination, to an ergometric examination ECHO cardiography, occlusion plethysmography, and concurrently serum levels of adrenaline (A), noradrenaline (NA), renin, cyclic adenosine monophosphate (cAMP) beta receptors before and after four weeks treatment with enalapril were assessed. The results are consistent with available data from the literature where administration of inhibitors of the angiotensin converting enzyme (ACE) caused a reduction of the peripheral vascular resistance and increased blood flow assessed by means of occlusion plethysmography. Similar results were recorded after captopril administration for a one year period, as reported by Agabiti-Rose (1). Statistically significant differences were detected between hypertonics given placebo and those given enalapril for four weeks, as regards blood flow at rest and peripheral vascular resistance at rest. There was also a significant difference when hypertonic and normotonic subjects were compared. The results are presented in tables and figures.