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Left ventricular hypertrophy in hypertension. Prevalence and relationship to pathophysiologic variables
Hypertension (Dallas, Tex. : 1979)
|February 1, 1987
Summary
Echocardiography reveals left ventricular hypertrophy (LVH) in hypertensive patients, linked to activity-based blood pressure. LVH severity correlates with exercise response and blood viscosity, offering insights into hypertension pathophysiology.
Area of Science:
- Cardiology
- Hypertension Research
- Medical Imaging
Background:
- Echocardiography has rapidly advanced the understanding of left ventricular hypertrophy (LVH) in hypertension.
- LVH prevalence varies based on patient demographics and population selection.
- Ambulatory blood pressure monitoring is more indicative of LVH than physician-measured readings.
Purpose of the Study:
- To explore the relationship between echocardiographic measurements of left ventricular mass and hypertension.
- To investigate the pathophysiology of left ventricular hypertrophy in hypertensive individuals.
- To assess the role of blood pressure monitoring in natural settings for LVH evaluation.
Main Methods:
- Utilized echocardiographic techniques to measure left ventricular muscle mass.
- Compared left ventricular mass with blood pressure readings from physician's office, portable recorders, and home manometers.
- Analyzed correlations between left ventricular hypertrophy, peripheral resistance, cardiac output, blood viscosity, and neurohormonal activity.
Main Results:
- Increased left ventricular mass is prevalent in a subset of hypertensive patients, influenced by sex, race, and age.
- Activity-related blood pressure is a stronger predictor of LVH than isolated physician measurements.
- Concentric LVH and increased peripheral resistance are interrelated; some mild hypertension cases show high cardiac output and normal LVH.
- Left ventricular functional response to exercise is inversely related to hypertrophy degree.
- High blood viscosity is associated with LVH in essential hypertension.
- Echocardiographic data present mixed evidence regarding the role of sympathetic and renin-angiotensin systems in hypertensive cardiac hypertrophy.
Conclusions:
- Echocardiographic assessment of left ventricular structure and function is valuable in hypertension research.
- Understanding LVH pathophysiology in hypertension requires considering ambulatory blood pressure and patient characteristics.
- Further research is needed to clarify the role of specific neurohormonal systems in hypertensive cardiac hypertrophy.