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[Anomalies of diastolic filling common to both ventricular cavities in hypertension]
Insights
Hypertension alters heart valve flow patterns, affecting ventricular filling in both left and right sides of the heart. These changes correlate with left ventricular structural characteristics in hypertensive patients.
Area of Science:
- Cardiology
- Cardiovascular Physiology
Background:
- Hypertension is a major risk factor for cardiovascular disease.
- Understanding its impact on cardiac function is crucial for patient management.
Purpose of the Study:
- To investigate the effects of primary hypertension on mitral and tricuspid valve flow.
- To determine if these alterations correlate with left ventricular structural changes.
Main Methods:
- Echocardiographic assessment of mitral and tricuspid valve flow patterns.
- Categorization of hypertensive patients based on left ventricular wall thickness.
- Comparison of flow velocities and areas between hypertensive and normotensive groups.
Main Results:
- Hypertensive patients showed significantly higher peak flow velocity in late diastole (PFVA) compared to normotensive subjects.
- The ratio of early to late diastolic peak flow velocity (PFVE/PFVA) and E'/A' areas were significantly reduced in hypertensives.
- Similar flow pattern alterations were observed in the tricuspid valve.
Conclusions:
- Primary hypertension alters diastolic ventricular filling dynamics.
- These changes affect both left and right heart sides.
- Left ventricular structural remodeling in hypertension is associated with altered valve flow patterns.
Abstract:
In a population of 43 primary hypertensive patients we investigated the mitral and tricuspid valve flow in order to test whether: a) hypertension, as compared to normotension (Group 0, 10 normotensive subjects), alters the ventricular filling; b) changes are shared by the left and the right side of the heart; c) the structural characteristics (ultrasounds) of the left ventricle (LV) correlate with these changes. Hypertensives were divided into: Group 1, 11 patients in whom thickness (th) of both the ventricular septum (VS) and LV posterior wall (PW) was within a normal range (mean +/- 1 SD of values derived from 145 normal subjects); Group 2, 8 patients whose VSth exceeded normal values by more than 1 SD; Group 3, 24 patients in whom both VSth and PWth exceeded normal values by more than 1 SD. Groups 0, 1, 2 and 3 were homogeneous regarding gender, age, heart rate, LV cavity dimensions and systolic function. Blood pressure was slightly increased from Group 1 to Group 2 to Group 3. Mitral peak flow velocity in early diastole (PFVE) was similar in the 4 groups; in late diastole peak flow velocity (PFVA) through the same valve in each of the 3 hypertensive groups was significantly higher than in Group 0; as a consequence, PFVE/PFVA and E'/A' areas in hypertensives were significantly smaller than in normotensives. The flow pattern through the tricuspid valve was quite similar to this in each group.(ABSTRACT TRUNCATED AT 250 WORDS)