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Published on: September 17, 2015
Time course of the effects of temocapril on cardiovascular structure and function in patients with essential
1The Second Department of Internal Medicine, Toyama Medical and Pharmaceutical University, Japan.
Insights
Angiotensin-converting enzyme (ACE) inhibition with temocapril gradually reversed structural changes in hypertensive patients' left ventricles and arterioles over 12 months. However, large artery stiffness remained unaffected by this ACE inhibition therapy.
Area of Science:
- Cardiology
- Pharmacology
- Hypertension Research
Background:
- Essential hypertension is associated with cardiovascular structural changes.
- Angiotensin-converting enzyme (ACE) inhibitors are a common treatment for hypertension.
- Understanding the time course of structural changes during ACE inhibition is crucial.
Purpose of the Study:
- To investigate the time course of cardiovascular structural changes in essential hypertension patients treated with an ACE inhibitor.
- To assess the impact of temocapril on left ventricular structure, forearm vascular resistance, and carotid artery stiffness.
Main Methods:
- A 12-month study involving 15 essential hypertensive subjects.
- Measurements included left ventricular structure, forearm minimal vascular resistance, and carotid artery stiffness beta.
- Temocapril treatment was administered, with assessments during a placebo period and at 2, 6, and 12 months.
Main Results:
- Blood pressure decreased within 2 weeks and remained controlled for 12 months.
- Left ventricular mass index significantly decreased after 2 months and normalized by 12 months.
- Forearm minimal vascular resistance gradually decreased over 12 months.
- Carotid artery stiffness beta showed no significant alteration during the 1-year treatment period.
Conclusions:
- Temocapril treatment led to gradual regression of left ventricular and arteriolar structural changes in hypertensive patients.
- Large artery structure, as indicated by carotid artery stiffness, was not affected by 1-year ACE inhibition.
- ACE inhibition demonstrates progressive reversal of specific cardiovascular structural abnormalities in hypertension.
Abstract:
To investigate the time course of cardiovascular structural changes in patients with essential hypertension after angiotensin-converting enzyme (ACE) inhibition, we determined left ventricular structure, minimal vascular resistance in the forearm as an index of resistance vessel structure and stiffness beta of carotid artery in 15 essential hypertensive subjects during a placebo period and after 2, 6, and 12 months of temocapril treatment. Blood pressure decreased within 2 weeks, and the antihypertensive effects were noted throughout the 12-month administration period. Left ventricular mass index decreased significantly after 2 months (120+/-12 to 106+/-9 g/m2; p < 0.01) and was normalized after 12 months (88+/-6 g/m2). Postischemic minimal vascular resistance in the forearm decreased gradually from 2.1+/-0.5 to 1.6+/-0.4 PRU at month 12 of temocapril treatment. In contrast, increased stiffness index beta of carotid artery was not altered during a 1-year treatment period (11.4+/-4.9 to 11.6+/-3.8 at month 12 of treatment). These data indicated that the regression of structural changes of left ventricle and arterioles occurred gradually and progressively for 1-year treatment with ACE inhibition, but large arteries were not affected.
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