心臟病及保健 Heart Disease And Health http://心臟病.tw www.heartdisease.idv.tw
Andrew Ying-Siu Lee, MD,PhD.
Cardiomyopathies mean abnormal heart muscles not due to hypertensive, valvular, pericardial or congenital
heart diseases. Etiology include: (1) primary cardiomyopathies (idiopathic, hereditary, fibrosis), (2) secondary
cardiomyopathies (infections such as viral or bacterial myocarditis, metabolic, collagen diseases such as systemic
lupus erythematosus, rheumatoid arthritis, infiltrative such as amyloidosis, tumors, neuromuscular diseases such
as myopathies or polyneuritis, allergy, toxic agents, endomyocardial fibrosis, post-partum, obesity, electrolyte
imbalance, genetic diseases etc.)
Cardiomyopathies are classified as :-
(1) IDIOPATHIC DILATED CARDIOMYOPATHY:
Characterized by cardiac enlargement with impaired systolic function in one or both ventricles. Common
symptoms include: fatigue, weakness, exercise intolerance, exertional dyspnea, orthopnea, paroxysmal nocturnal
dyspnea, palpitation, chest discomfort, arrhythmias, edema, pulmonary edema etc.
Some patients become stable after medical treatment. However, most patients continue to worsen and die of
heart failure, arrhythmias, sudden cardiac death.
(2) HYPERTROPHIC CARDIOMYOPATHY:
Characterized by myocardial hypertrophy with diastolic rather than systolic dysfunction. Common symptoms
include: dyspnea, chest discomfort, palpitation, dizziness, fainting, sudden cardiac death.
Therapy include medical treatment, cardiac catheterization and surgery.
(3) RESTRICTIVE CARDIOMYOPATHY:
Characterized by abnormal diastolic heart function due to myocardial fibrosis, infiltration, scarring.
Common symptoms include: weakness, dyspnea, exertional chest pain, edema.