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Doppler echocardiographic analysis of left ventricular filling in treated hypertensive patients
Insights
Hypertension can alter heart function early, even with controlled blood pressure. Doppler echocardiography reveals increased late left ventricular filling velocity in hypertensive patients, suggesting cardiac changes independent of hypertrophy.
Area of Science:
- Cardiology
- Hypertension Research
- Echocardiography
Background:
- Early detection of cardiac dysfunction is crucial for managing hypertensive patients.
- Hypertension is a significant risk factor for cardiovascular disease, often leading to cardiac remodeling.
- Understanding diastolic filling patterns can provide insights into early cardiac changes.
Purpose of the Study:
- To evaluate left ventricular diastolic filling patterns in treated hypertensive patients compared to normotensive controls.
- To determine if Doppler echocardiography can detect early signs of cardiac dysfunction in hypertension.
- To investigate the relationship between diastolic filling patterns and traditional markers of hypertensive heart disease.
Main Methods:
- Doppler echocardiography was used to assess left ventricular diastolic filling.
- The study included 18 treated hypertensive patients and 20 normotensive controls.
- Key measurements included peak velocity of late left ventricular filling.
Main Results:
- Hypertensive patients exhibited a significantly greater peak velocity of late left ventricular filling compared to normotensive subjects (69 +/- 14 vs. 52 +/- 13 cm/s).
- This difference was observed across different age groups within the hypertensive cohort.
- Increased late filling velocity did not correlate with left ventricular hypertrophy, blood pressure levels, or duration of hypertension.
Conclusions:
- Elevated peak velocity of late left ventricular filling is a potential indicator of early cardiac changes in hypertensive individuals.
- These diastolic filling abnormalities may occur independently of left ventricular hypertrophy.
- These findings suggest that diastolic dysfunction can persist despite effective blood pressure management in hypertension.
Abstract:
Early detection and prevention of cardiac dysfunction is an important goal in the management of hypertensive patients. In this study, Doppler echocardiography was used to evaluate the pattern of left ventricular diastolic filling in 38 subjects: 18 treated hypertensive patients (blood pressure 141 +/- 17/83 +/- 10 mm Hg, mean +/- SD) without other coronary risk factors and 20 risk-free normotensive subjects of similar age (47 +/- 10 and 49 +/- 13 years, respectively). Peak velocity of late left ventricular filling due to the atrial contraction was greater in hypertensive compared with normotensive subjects (69 +/- 14 versus 52 +/- 13 cm/s; p less than 0.001). Peak velocity of late filling was significantly greater in hypertensive versus normotensive subjects in those aged 50 years or younger and those older than age 50 (65 +/- 12 versus 50 +/- 11; p less than 0.01 and 75 +/- 15 versus 56 +/- 15 cm/s; p less than 0.05, respectively). In hypertensive subjects, peak velocity of late filling did not correlate with routine indexes of hypertensive heart disease (including posterior wall thickness and left ventricular mass), systolic and diastolic blood pressure or duration of hypertension. These results indicate that increased velocity of late left ventricular filling may be independent of left ventricular hypertrophy and persist despite effective blood pressure control.