How should we assess diastolic function in hypertension?
Insights
Maximal longitudinal LV relaxation velocity (RVm) is the most effective index for assessing diastolic function in hypertensive patients with normal systolic function, showing a clearer distinction compared to E/A ratio and atrial to total mitral annulus motion (AC).
Area of Science:
- Cardiology
- Cardiovascular Physiology
- Echocardiography
Background:
- Hypertension is a common condition that can lead to diastolic dysfunction.
- Assessing diastolic function is crucial for managing cardiovascular risk.
- Existing indices for diastolic function assessment show limitations in differentiating hypertensive patients.
Purpose of the Study:
- To compare the effectiveness of three echocardiographic indices of diastolic left ventricular (LV) function.
- To identify the most suitable index for evaluating diastolic LV function in hypertensive patients with preserved systolic function.
Main Methods:
- Echocardiographic assessment of diastolic LV function using E/A ratio, atrial to total mitral annulus motion (AC), and maximal longitudinal LV relaxation velocity (RVm).
- Study included 19 hypertensive patients with normal systolic function and 20 healthy controls.
- Pulsed Doppler and M-mode recordings from apical views were utilized.
Main Results:
- All three indices (E/A ratio, AC, RVm) indicated impaired diastolic function in hypertensive patients compared to controls.
- E/A ratio and AC showed significant overlap between hypertensive patients and controls.
- RVm demonstrated a highly significant difference between groups with minimal overlap, suggesting superior discriminatory power.
Conclusions:
- Maximal longitudinal LV relaxation velocity (RVm) appears to be the most appropriate index for assessing diastolic function in hypertensive patients with normal systolic function.
- RVm offers better differentiation of diastolic dysfunction in this patient population compared to E/A ratio and AC.
Objective:
the aim of our study was to assess the relative merits of three indices of diastolic LV function in a group of patients with hypertension and normal systolic function and a group of healthy controls.
Design:
In this echocardiographic study, diastolic LV function was assessed by E/A ratio using pulsed Doppler recording and by atrial to total mitral annulus motion (AC) and maximal longitudinal LV relaxation velocity (RVm) by M-mode recordings from apical views. The study took place in the Department of Clinical Physiology in a secondary referral centre. Nineteen consecutive patients with uncomplicated hypertension referred to echocardiographic examination and 20 age- and sex-matched controls were included in the study.
Results:
All three measures of diastolic function, E/A ratio, AC and RVm indicated impaired diastolic function in the hypertensive group, compared to the healthy controls. However, E/A ratio and AC showed a considerable overlap between the groups, whereas there was a highly significant difference in RVm between the hypertensive group and the controls, with much less of an overlap.
Conclusion:
The results indicate that of these three indices of diastolic function, RVm may be the most appropriate in patients with hypertension and normal systolic LV function.
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