Definition: chronic cor p. is characterized by hypertrophy of the right ventricle resulting from disease of the lungs, except for lung changes in diseases that primarily affect the left side of the heart and pulmonary artery and excluding congenital heart disease; acute cor p. is characterized by dilation and failure of the right side of the heart due to pulmonary embolism. In both types, characteristic electrocardiogram changes occur, and in later stages there is usually right-sided cardiac failure.
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