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Disparity between diastolic mitral flow characteristics and left ventricular mass in essential hypertension
M Zabalgoitia1, N U Rahman, W E Haley
1University of Texas Health Science Center at San Antonio, 78284-7872, USA.
Insights
Left ventricular hypertrophy and aging can impair heart relaxation. In elderly hypertensives, intrinsic heart muscle composition, not just size, influences diastolic function, complicating diagnosis.
Area of Science:
- Cardiology
- Geriatrics
- Cardiovascular Imaging
Background:
- Left ventricular (LV) hypertrophy and aging are linked to abnormal LV relaxation.
- Diastolic dysfunction is a common concern in elderly populations, particularly those with hypertension.
Purpose of the Study:
- To assess the influence of LV mass on Doppler-derived filling patterns in individuals aged 50 years and older.
- To investigate the relationship between cardiac hypertrophy, myocardial composition, and diastolic properties in essential hypertension.
Main Methods:
- Utilized Doppler echocardiography to evaluate LV filling patterns.
- Analyzed a large population cohort aged 50 years and above.
- Correlated LV mass and diastolic filling parameters with myocardial characteristics.
Main Results:
- In essential hypertension, intrinsic myocardial composition was found to be a more significant determinant of LV diastolic properties than cardiac hypertrophy.
- LV mass did not consistently predict diastolic filling patterns in the elderly hypertensive cohort.
- A discrepancy was observed between LV mass and Doppler-derived diastolic filling patterns.
Conclusions:
- Intrinsic myocardial properties play a crucial role in diastolic function in elderly hypertensives, potentially overriding the impact of LV hypertrophy.
- Diagnosing diastolic dysfunction in elderly hypertensive patients presents challenges due to the complex interplay of aging, hypertrophy, and myocardial composition.
- Further research is needed to refine diagnostic criteria for diastolic dysfunction in this demographic.
Abstract:
Because left ventricular (LV) hypertrophy and aging have been associated with abnormal LV relaxation, this study evaluated the impact of LV mass on the filling patterns derived by Doppler in a large population aged > or =50 years. Results suggest that in essential hypertension the intrinsic myocardial composition is more important than cardiac hypertrophy in determining LV diastolic properties. This apparent discrepancy between LV mass and diastolic filling patterns highlights the difficulty in establishing the diagnosis of diastolic dysfunction in elderly hypertensives.