Related Experiment Videos
[Precocity of diastolic dysfunction in hypertensive cardiopathy]
1Serviço de Medicina I, Hospital de Santa Maria, Lisboa.
Insights
Left ventricular hypertrophy (LVH) is a cardiovascular risk factor. Diastolic dysfunction, a common finding in hypertension, may precede LVH and contribute to cardiac issues.
Area of Science:
- Cardiology
- Hypertension Research
- Cardiac Physiology
Context:
- Left ventricular hypertrophy (LVH) is a recognized cardiovascular risk factor, often identified via echocardiography in hypertensive individuals.
- While systolic function is typically preserved, diastolic function alterations are common in hypertension, detectable by Echo-Doppler even without LVH.
- These changes may stem from alterations in contractile proteins, interstitial tissue, and reduced coronary reserve.
Purpose:
- To investigate the early detection and implications of diastolic dysfunction in hypertensive patients.
- To explore the relationship between diastolic dysfunction, LVH, and other cardiovascular parameters.
- To understand the potential role of diastolic dysfunction in the pathogenesis of cardiac failure and its influence on cardiopulmonary reflexes.
Summary:
- Diastolic dysfunction is frequently observed in hypertensive patients, sometimes preceding or occurring independently of left ventricular hypertrophy (LVH).
- Echo-Doppler studies reveal early functional and structural changes impacting diastolic function, even in normotensive individuals with a family history of hypertension.
- The precise role of diastolic dysfunction—whether a causal mechanism or a risk marker—in hypertension and heart failure requires further elucidation.
Impact:
- Highlights the significance of diastolic function assessment in hypertensive patients for early risk stratification.
- Suggests potential therapeutic targets for preventing cardiac dysfunction and failure in hypertension.
- Underscores the need for further research to differentiate the mechanistic role versus risk marker status of diastolic dysfunction in cardiovascular disease.
Abstract:
Left ventricular hypertrophy (LVH) is a well defined cardiovascular risk factor and is frequently detected by echocardiography in hypertensive patients. Systolic cardiac function at rest is usually preserved in hypertension, however, diastolic function may be frequently altered. Evidence for these changes has been demonstrated by Echo-Doppler even without concomitant existence of LVH. Quantitative and qualitative changes in contractile proteins and interstitial tissue as well as reduction of coronary reserve may be related to the mentioned dysfunction. Recent studies have confirmed the precocity of diastolic dysfunction both in laboratory animals as well as man. Further significant differences have been shown between normotensives with and without a family history of systemic hypertension. The relative importance of diastolic disfunction is also related to its possible role in the genesis of cardiac failure and its probable role in the modulation of cardiopulmonary reflexes in addition to the hemodynamics of arterial hypertension. It is not yet known if the presence of diastolic dysfunction is a mechanism or a risk marker like LVH.