What is the pathogenesis of tricuspid stenosis? 's general knowledge

What is the pathogenesis of tricuspid stenosis? 's general knowledge
The overwhelming majority of tricuspid stenosis is caused by rheumatic fever, other inborn tricuspid valve locking, right room tumour and a kind of cancer syndrome that there are the cause of diseases rarely. The clinical feature of the right room tumour is that symptom develops fast; Kind of cancer syndrome is often with the backflow of tricuspid valve at the same time. Rheumatism tricuspid stenosis seldom exists alone, nearly with bicuspid valve pathological change at the same time, mostly the mitral stenosis. About 15% have tricuspid stenosis, but only 5% of clinical persons who can diagnose clearly in the rheumatic heart disease patient.
Tricuspid stenosis make atrium dextrum and appear the intersection of relaxation and issues of steps poor pressure between the right ventricle. As sport or inhale, make the intersection of tricuspid valve and blood flow volume increase, relaxation issues of right room and pressure steps between the right room increase badly promptly; When exhaling and making the blood flow of tricuspid valve reduce, it can be reduced that the rank of this pressure is bad. If a pressure rank of average relaxation exceeds 053kPa( 4mmHg) badly When, can make the average right room press and raise and cause intravenous extravasated blood of the body, showing as the neck vein is full of, hepatomegaly, ascites and edema,etc.. The atrium dextrum a wave extremely increases, can reach the level of the systolic pressure of right ventricle at the time of sinus rhythm of the heart. Quiet to stop the heart and arrange blood volume to drop, has not also increased at the time of sports; So the atrium sinistrum was pressed, lung arterial pressure and right ventricle can not obviously rise to press.
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