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Regression of left ventricular hypertrophy in hypertension with alpha-adrenergic blockade: physiological basis and
1Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas 75235-8852.
Insights
Alpha-adrenergic blockers effectively reduce left ventricular mass in hypertensive patients. These findings suggest alpha-adrenergic blockers can promote regression of left ventricular hypertrophy, a serious consequence of hypertension.
Area of Science:
- Cardiology
- Pharmacology
- Hypertension Research
Background:
- Left ventricular hypertrophy (LVH) is a significant risk factor for adverse cardiovascular outcomes in hypertension.
- Neurohumoral mechanisms, particularly adrenergic activation, contribute to LVH development.
- Hemodynamic factors alone do not fully explain LVH genesis.
Purpose of the Study:
- To evaluate the impact of adrenergic blockade on left ventricular hypertrophy in hypertensive patients.
- To determine if alpha-adrenergic blockers can induce regression of left ventricular mass.
Main Methods:
- Review of recent studies investigating the effects of postsynaptic alpha-adrenergic blockers.
- Analysis of data on changes in left ventricular mass in hypertensive individuals.
Main Results:
- Postsynaptic alpha-adrenergic blockers demonstrated a significant reduction in left ventricular mass.
- Evidence supports the role of adrenergic activation in the pathogenesis of LVH.
Conclusions:
- Alpha-adrenergic blockers represent a potential therapeutic option for regressing left ventricular hypertrophy.
- These agents can be incorporated into antihypertensive regimens to manage LVH.
Abstract:
Left ventricular hypertrophy may be a serious consequence of chronic untreated hypertension since it may accentuate the risk of congestive heart failure, arrhythmias, coronary ischaemias and sudden death. Although haemodynamic factors may play a role in the genesis of left ventricular hypertrophy, certain neurohumoral mechanisms such as the adrenergic nervous system may induce left ventricular hypertrophy in patients with hypertension. There is considerable evidence to implicate adrenergic activation in the pathogenesis of left ventricular hypertrophy. Thus, adrenergic blockade may have a favourable impact on the course of left ventricular hypertrophy. Recent studies discussed in this paper have demonstrated that postsynaptic alpha-adrenergic blockers cause a significant reduction in the left ventricular mass. It is concluded that alpha-adrenergic blockers can be added to the list of antihypertensive drugs which can cause regression of left ventricular hypertrophy in patients with hypertension.
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