Abstract
The left ventricle (LV) plays a central role in the maintenance of health of children and adults due to its role as the major pump of the heart. In cases of LV dysfunction, a significant percentage of affected individuals develop signs and symptoms of congestive heart failure (CHF), leading to the need for therapeutic intervention. Therapy for these patients include anticongestive medications and, in some, placement of devices such as aortic balloon pump or left ventricular assist device (LVAD), or cardiac transplantation. In the majority of patients the etiology is unknown, leading to the term idiopathic dilated cardiomyopathy (IDC). During the past decade, the basis of LV dysfunction has begun to unravel. In approximately 30-40% of cases, the disorder is inherited; autosomal dominant inheritance is most common (although X-linked, autosomal recessive and mitochondrial inheritance occurs). In the remaining patients, the disorder is presumed to be acquired, with inflammatory heart disease playing an important role. In the case of familial dilated cardiomyopathy (FDCM), the genetic basis is beginning to unfold. To date, two genes for X-linked FDCM (dystrophin, G4.5) have been identified and four genes for the autosomal dominant f...Continue Reading
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