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[Hypertensive heart disease simulating dilated cardiomyopathy]
Insights
Hypertension can cause heart conditions that mimic dilated cardiomyopathy (DCM). While treatment improved symptoms in hypertensive patients with DCM-like features, their heart function did not fully normalize, suggesting other contributing factors.
Area of Science:
- Cardiology
- Cardiovascular Imaging
- Pathophysiology
Context:
- Hypertension is a common condition with significant cardiovascular implications.
- Dilated cardiomyopathy (DCM) is characterized by left ventricular enlargement and impaired contractility.
- Differentiating hypertensive heart disease from DCM is crucial for appropriate management.
Purpose:
- To investigate the clinical and echocardiographic characteristics of hypertensive patients exhibiting DCM-like features.
- To compare these patients with hypertensive patients without cardiac dilation and those with idiopathic DCM.
- To elucidate the underlying mechanisms of DCM-like presentation in hypertension.
Summary:
- Twelve hypertensive patients (HT-DCM) presented with echocardiographic findings simulating DCM, including left ventricular dilatation and reduced contractility without wall thickening.
- On admission, HT-DCM patients showed congestive heart failure (CHF) and similar clinical/echocardiographic findings to DCM patients.
- Following treatment, HT-DCM patients showed improved CHF, reduced LV dimensions, and improved wall motion, though LV function remained subnormal. Endomyocardial biopsies showed no significant differences between HT-DCM and DCM.
Impact:
- This study highlights that hypertension can induce DCM-like cardiac changes.
- The findings suggest that factors beyond hypertension contribute to the development of these features.
- Understanding these mechanisms can lead to improved diagnostic and therapeutic strategies for hypertensive heart disease.
Abstract:
Echocardiography was performed for 246 patients with hypertension. Among the 246 patients, echocardiographic features simulating dilated cardiomyopathy (DCM) were observed in 12. These patients had past history of hypertension and prominent left ventricular dilatation with reduced left ventricular contractility, but no left ventricular wall thickening. To elucidate the mechanism producing DCM-like features in patients with hypertension, the clinical and echocardiographic findings of the 12 hypertensive patients (HT-DCM) were compared with those of 50 hypertensive patients without dilated left ventricles and of 31 patients with DCM. On admission, all patients with HT-DCM had congestive heart failure (CHF) without high blood pressure and their echocardiograms revealed the abnormal findings described above. There were no differences of the clinical and echocardiographic findings on admission between HT-DCM and DCM. Following medical treatment, relatively early improvement of CHF was noted in all patients with HT-DCM; the LV dimension decreased and diffuse wall motion abnormality improved steadily with gradual elevation of blood pressure during the follow-up periods. The LV function of most patients with HT-DCM improved markedly but never reached normal levels. There were no significant differences the right ventricular endomyocardial biopsy findings of between DCM and HT-DCM. It was suggested the DCM-like features in these cases are caused, not only by hypertension, but by other factors, as well.