A. Hypertrophic Cardiomyopathy
Maron et al. have contributed greatly to our understanding of the athlete and heart disease and indicated that hypertrophic cardiomyopathy is the single most common cause of sudden death in young athletes. This is all the more devastating to affected families and to perturbed physicians because of the frequent absence of symptoms prior to death. Hypertrophic cardiomyopathy accounts for more than 33% of these deaths.

1. Definition
Hypertrophic cardiomyopathy is defined and diagnosed by the demonstration of unexplained left ventricular hyper¬trophy associated with nondilated ventricular cavities. Figure 1 illustrates morphologic components of the disease process. Note the conspicuous hypertrophy of the inter-ventricular septum (labeled VS) that separates the left and right ventricle. The left ventricle cavity is reduced to a slit-like form as it merges with the aorta (AO), and the blood flow delivery from the left ventricle into the aorta is obstructed. Thus, initially the disease was appropriately called idiopathic hypertrophic subaortic stenosis (IHSS), then in the 1970s, it was renamed hypertrophic obstructive cardiomyopathy (HOCM). In the 1980s it became well known that many patients did not develop obstructive features, and the designation hypertrophic cardiomyopathy became used worldwide.

Страницы: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8