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主动脉狭窄包括主动脉瓣狭窄、主动脉瓣下狭窄和瓣上主动脉狭窄三种类型。1.主动脉瓣狭窄可由后天和先天因素引起。其中后天因素引起者以风湿性心脏病主动脉瓣狭窄为最多见。主要病变为结缔组织的炎症,瓣膜瘢痕形成,引起狭窄。临床主要表现为全身或心脏缺血的症状,心脏杂音,主动脉瓣区第二心音减
Aortic stenosis, including aortic stenosis, aortic stenosis and aortic stenosis of three types. Aortic stenosis can be caused by acquired and innate factors. One of the factors causing acquired rheumatic heart disease is the most common aortic valve stenosis. The main lesion is connective tissue inflammation, valve scar formation, causing stenosis. Clinical manifestations of systemic or cardiac ischemia symptoms, heart murmur, aortic valve area of the second heart sound less