Physiological _'s general knowledge of a narrow pathology of the lung artery

Physiological _'s general knowledge of a narrow pathology of the lung artery
No matter the intersection of lung and the intersection of artery and mouth of those type is narrow, make the right ventricle arrange the blood and is obstructed, the pressure increases in the right ventricle, the range proportional to a narrow intensity of lung artery that increase. The pressure keeps normal or slightly drops in the lung artery, therefore the right room and steps a pressure rank in lung artery badly, its steps of pressure increase badly with a narrow intensity of lung artery, such as stepping a pressure rank badly in 5. 34kPa( 40mmHg) The following is that slight the intersection of lung and the intersection of artery and mouth is narrow, arrange blood influence not big on the right heart, as stepping a pressure rank badly in 5. 34- 13.33kPa( 40- 100mmHg) Between belong to being medium-sized by degrees of lung when it is narrow in mouth in artery,it begin to be influenced for to last blood to rooms right, especially the right heart arranges blood volume to reduce when moving, act as and step one to press the steps and is greater than 13.33kPa( 100mmHg) badly The above right room arrange blood, obstruct obviously, even at quiet interest, right ventricle arrange blood volume see, reduce also, the load of right room obviously increases. It is long and as time passes, will impel right ventricular hypertrophy, so that the cardiac muscle of right room strains, the right ventricle expands leading to the fact the tricuspid valve ring will be expanded, produce the tricuspid valve relativity and can not close completely, then the pressure of atrium dextrum increases, the atrium dextrum is loose, when the pressure of atrium dextrum is higher than the pressure of atrium sinistrum, when not closing with the oval nest of the insula, can cause the blood to divide and flow into the atrium sinistrum from the atrium dextrum, central cyanosis appears on clinic, the load of long-term right ventricle increases, can cause the right heart to be depleted finally, symptoms such as intravenous anger one of neck, hepatomegaly, ascites and lower extremities edema,etc. appear.
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