Cardiomyopathies
Cardiomyopathies
Introduction Cardiomyopathies are a group of diseases affecting the myocardium primarily Less information is available about cardiac muscle disorders than about other forms of cardiac disease such as valvular,congenital,or coronary heart disease.Some forms of cardiomyopathy have a clear-cut cause,while many other types of myocardial disease occur without explanation.Because of the scarcity of knowledge concerning heart muscle disorders,a number of different classification schemes have been suggested,based on the pathologic and hemodynamic abnormality present.We favor the classification summarized in Table 1
Introduction ◼ Cardiomyopathies are a group of diseases affecting the myocardium primarily .Less information is available about cardiac muscle disorders than about other forms of cardiac disease such as valvular, congenital,or coronary heart disease. Some forms of cardiomyopathy have a clear-cut cause, while many other types of myocardial disease occur without explanation. Because of the scarcity of knowledge concerning heart muscle disorders, a number of different classification schemes have been suggested, based on the pathologic and hemodynamic abnormality present. We favor the classification summarized in Table 1
Table 1 Dilated(congestive)cardiomyopathy(85%)-with dilated left ventricle and impaired systole Hypertrophic(Obstructive)cardiomyopathy(10% )hypertrophy of ventricles,especially the interventricular septum. Restrictive cardiomyopathy(5%)-restricted ventricular filling
Table 1 ◼ Dilated(congestive)cardiomyopathy(85%)-with dilated left ventricle and impaired systole ◼ Hypertrophic(Obstructive)cardiomyopathy( 10% )hypertrophy of ventricles, especially the interventricular septum. ◼ Restrictive cardiomyopathy(5%)-restricted ventricular filling
正常 打扩张型心肌病 肥厚型心肌病 限制型心肌闲
Dilated Cardiomyopathy Introduction Dilated cardiomyopathy (DCM)is a syndrome characterized by cardiac enlargement and impaired systolic function of one or both ventricles. Although it was formerly called congestive cardiomyopathy,the term dilated cardiomyopathy is now preferred because the earliest abnormality usually is ventricular enlargement and systolic contractile dysfunction,with congestive heart failure often developing later. ■Epidemiology The incidence of DCM is reported to about 5 to 8 cases per 100,000 population per year and appear to be increasing,although the true figure likely is higher as a consequence of underreporting of mild or asymptomatic cases.It occurs almost three times more frequently in blacks and males than in white and females,and this difference does not appear to be related solely to differing degrees of hypertension, cigarette smoking,or alcohol use;furthermore,survival in blacks appears to be worse than in whites
Dilated Cardiomyopathy ◼ Introduction ◼ Dilated cardiomyopathy (DCM) is a syndrome characterized by cardiac enlargement and impaired systolic function of one or both ventricles. Although it was formerly called congestive cardiomyopathy, the term dilated cardiomyopathy is now preferred because the earliest abnormality usually is ventricular enlargement and systolic contractile dysfunction, with congestive heart failure often developing later. ◼ Epidemiology The incidence of DCM is reported to about 5 to 8 cases per 100,000 population per year and appear to be increasing, although the true figure likely is higher as a consequence of underreporting of mild or asymptomatic cases. It occurs almost three times more frequently in blacks and males than in white and females, and this difference does not appear to be related solely to differing degrees of hypertension, cigarette smoking, or alcohol use; furthermore, survival in blacks appears to be worse than in whites