Hypertension and diastolic function
1Department of Internal Medicine, University of Brescia, Italy.
Insights
Systemic hypertension can cause early left ventricular (LV) diastolic dysfunction. Antihypertensive therapy improving LV mass may enhance diastolic function, suggesting LV mass reduction benefits long-term hypertension prognosis.
Area of Science:
- Cardiology
- Hypertension Research
- Cardiac Physiology
Background:
- Left ventricular (LV) diastolic dysfunction is an early sign of systemic hypertension, even with normal systolic function.
- Diastolic filling abnormalities are linked to LV hypertrophy and influenced by factors like age, weight, blood pressure, and cardiac structure.
- Abnormal diastolic function may impair LV systolic response during exercise, despite normal resting function.
Purpose of the Study:
- To investigate the impact of antihypertensive therapy on LV diastolic function.
- To determine if regression of LV mass influences diastolic function.
- To explore the potential of LV mass reduction for improving hypertension prognosis.
Main Methods:
- Observational study analyzing diastolic filling indices in hypertensive patients.
- Evaluation of antihypertensive drug effects (ACE inhibitors, calcium antagonists) on diastolic function.
- Assessment of changes in LV mass and diastolic function following long-term antihypertensive treatment and withdrawal.
Main Results:
- Antihypertensive medications, particularly ACE inhibitors and phenylalkylamine calcium antagonists, improved diastolic function.
- Long-term antihypertensive therapy led to significant reduction in LV mass and improvement in diastolic filling.
- LV mass remained reduced even after treatment withdrawal, suggesting a lasting effect.
Conclusions:
- Regression of LV mass induced by antihypertensive therapy may improve LV diastolic function.
- Further research is needed to confirm the long-term prognostic impact of improved diastolic function in hypertensive patients.
Abstract:
Abnormalities in left ventricular (LV) diastolic function in the presence of normal LV systolic performance is one of the earliest cardiac manifestations of systemic hypertension. Alterations in diastolic filling indices have been observed more clearly in patients with LV hypertrophy, although it is evident that these filling abnormalities may be significantly influenced by age, bodyweight, blood pressure, left atrial size, LV systolic function, interstitial fibrosis, impaired coronary blood flow, and sympathetic stimulation. Several studies indicate that abnormal diastolic function may be responsible, at least in part, for an impaired LV systolic response to isotonic or isometric exercise, even when systolic performance is normal at rest. Short and long term administration of some antihypertensive drugs, such as angiotensin converting enzyme (ACE) inhibitors and calcium antagonists, particularly of the phenylalkylamine type, may significantly improve diastolic function. We observed that abnormal diastolic filling was significantly improved when LV mass was reduced by long term antihypertensive therapy. Even when treatment was withdrawn and blood pressure had increased again, LV mass remained reduced. These results suggest that regression of LV mass might improve LV diastolic function per se. Further studies are needed to assess the effect of improvement of LV diastolic function on the long term prognosis of patients with hypertension.
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