Clinical studies of drug reversal of hypertensive left ventricular hypertrophy.

Abstract:

:Because left ventricular hypertrophy (LVH) is a strong risk factor for cardiac morbidity and mortality considerable interest has been generated concerning the possible effects of modifying LVH in hypertensive patients. In animal models disproportionate regression of left ventricular (LV) mass in relation to blood pressure may produce adverse effects on coronary blood flow reserve or LV systolic function. Clinical studies of modulation of LVH with antihypertensive drug therapy have been of two types: (1) large scale community comparison trials in which the prevalence of LVH and its regression were evaluated serially by electrocardiography (ECG) with stepped care drug therapy and (2) relatively short term (less than 2 years) studies with echocardiographic (ECHO) determination of LVH. The development of anatomically validated measurement of LV muscle mass by ECHO has demonstrated ECHO to be much more sensitive than ECG to assessment of LVH. Community comparison trials of stepped care therapy such as the Multiple Risk Factor Intervention Trial (MRFIT) and Hypertension Detection and Followup Study (HDFP) have not had the statistical power to demonstrate significant effects on risk reduction despite evidence for significant decrease in ECG-LVH despite participant numbers in the range of 8,000 to 10,000 followed serially for 5 to 6 years. Analysis of over 60 studies of hypertensive treatment using ECHO for assessment of LVH mass changes, averaging 10 to 15 subjects/study, indicates that correlation of reduction of LV mass with decrease in blood pressure has been weak (r = 0.255, P less than .025). Drug monotherapy studies have shown that use of calcium channel blockers and angiotensin converting enzyme inhibitors predominantly decrease LV mass.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

Am J Hypertens

authors

Liebson PR

doi

10.1093/ajh/3.6.512

subject

Has Abstract

pub_date

1990-06-01 00:00:00

pages

512-7

issue

6 Pt 1

eissn

0895-7061

issn

1941-7225

journal_volume

3

pub_type

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