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| pulmonic regurgitation ： ウィキペディア英語版 |
Pulmonary insufficiency
Pulmonary insufficiency (or incompetence, or regurgitation) is a condition in which the pulmonary valve is incompetent and allows backflow from the pulmonary artery to the right ventricle of the heart during diastole. While a small amount of backflow may occur ordinarily, it is usually only shown on an echocardiogram and is harmless. More pronounced regurgitation that is noticed through a routine physical examination is a medical sign of disease and warrants further investigation. If it is secondary to pulmonary hypertension it is referred to as a Graham Steell murmur.
==Signs and symptoms==
Because pulmonic regurgitation is the result of other factors in the body, any noticeable symptoms are ultimately caused by an underlying medical condition rather than the regurgitation itself.〔 However, more severe regurgitation may contribute to right ventricular enlargement by dilation, and in later stages, right heart failure.〔 A diastolic decrescendo murmur can sometimes be identified,( heard best) over the left lower sternal border.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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