Cause of disease and pathologic _'s general knowledge of tricuspid stenosis

Cause of disease and pathologic _'s general knowledge of tricuspid stenosis
Tricuspid stenosis (tricuspidstenosis) Rare on clinic, and the most for rheumatism membrane inflammation in the heart one and then offer as a gift and damage, often amalgamate a pathological change of bicuspid valve or aorta, simple tricuspid stenosis is rare. See more women, the overwhelming majority is caused by rheumatic fever, but rheumatism single tricuspid stenosis is extremely rare. As sequela of rheumatic fever, it is similar to mitral stenosis that pathology is changed, namely valve fiber take, increase thick, edge have superfluous living beings grow, three the intersection of valve and mutual adhesion or merge, form the narrow holes of triangle. Pathological change can also prolong and chorde tendinae and papilla skin. But intensity and range of tricuspid valve pathological change are lighter than bicuspid valve, it is rare to merge under the valve, and seldom there is calcium that is deposited. Narrow after taking shape, the obstacle happens when the blood flow flows into the right ventricle from the atrium dextrum, therefore the atrium dextrum is expanded, the pressure rises. Because of the reflux blockage of vena cava, venous pressure is raised for a long time, signs such as intravenous anger one of neck, hepatomegaly, ascites and four limbs edema,etc. appear. The right ventricle withers because of reducing in blood flow volume. When with bicuspid valve pathological change, the right ventricle is very plump.
Cause of disease
Overwhelming majority other caused by rheumatic fever tricuspid stenosis cause of disease have inborn the intersection of tricuspid valve and lock, right the intersection of room and tumour and a kind of cancer syndrome 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.
Pathology
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 53kPa( 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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