Draw back narrow pericarditis constrictive pericarditis_ general knowledge

Draw back narrow pericarditis constrictive pericarditis_ general knowledge
Summary
After acute pericarditis, can it is calm to leave scar adhesion and calcium on the pericardium. Most patients have only slight scar forming and loose or some adhesions, obviously increasing is thick that there is not the pericardium, do not influence the function of the heart, is called chronic adhesion pericarditis (chronic adhesive pericarditis) ,There is no importance on clinic. Some patient pericardiums ooze the liquid and exist for a long time, form chronic exudative pericarditis (chronic effusive pericarditis) ,It may be the chronic course of the acute non- specific pericarditis, are mainly shown as the pericardium accumulates the liquid, the prognosis is good, because a few patients form the hard and thick scar tissue, the pericardium loses the elasticity, influence shrink and relaxation function of the heart obviously, is called and drawn back narrow pericarditis, it including typical one is chronic to draw back narrow pericarditis (chronic constrictive pericarditis) Pericardium contract narrow subnormal temperature ooze liquid nature contract getting narrow pericarditis with take place already while the pericardium oozed liquid ( subacute effusive constrictive pericarditis) ,The latter has pericardiums that stops up to have pericardiums to draw back the narrow behavior on clinic, and it is chronic to develop into the typical one finally and draw back narrow pericarditis.
Cause of disease and having illness coming on in the mechanism
Contract getting narrow pericarditis continue take place on acute pericarditis, can observe acute to change into contracting the getting narrow evolution on being sometimes clinical, but most case acute stage symptoms are not obvious, have often already lost the pathologic characteristic of the original disease when the manifestation of the narrow pericarditis is obvious to contracting, so a lot of patient causes of disease can't be affirmed. Tuberculosis pericarditis takes the majority, secondly non- specific pericarditis in the definite cause of disease, radiotherapy and heart are increasing looking the person who causes surgery straight gradually, minority are suppurative pericarditis and wound pericarditis. Rheumatism pericarditis seldom causes the pericardium to contract narrowly.
Pathology changes
Behind the acute pericarditis, with ooze liquid, absorb gradually, pericardium dirty layer and the intersection of wall and one layer of extensive adhesions increase the thick and calcification, the pericardium stops up and organizes the outer cover, charter shelter and the oppression whole hearts and trunk roots tightly as a fibrous scar, also can confine to some positions in the surface of heart. The heart appearance is normal or relatively small, pericardium pathological change often involves the cardiac muscle which presses close to it, make the cardiac muscle wither. Pericardium pathology reveals non- specific transparent kind of sex change is organized. Some patients can still find tuberculosis or suppurative granulation tissue in the pericardium.
Pathologic physiology
The pericardium contracts narrowly to make the ventricle relaxation one expand blockage, it is reduced that the ventricle relaxation one is plentiful, lead to the fact the appearing amount of the heartbeat drops. In order to maintain the discharging amount of heart, the compensating heart rate is increased fast; Up and down the intersection of vena cava and reflux at the same time because pericardium contract narrow to obstruct too, appear the intersection of venous pressure and raise, the intersection of neck and intravenous the intersection of anger and piece, the intersection of liver and loud, ascites, lower extremities edema,etc.. The intravenous reflux increases but in order to draw back the narrow pericardium to make the ventricle lose ability of expansion of adaptability around while inhaling, cause venous pressure to increase, the neck vein is more obviously expanded, claim Kussmaul solicits while inhaling.
[1]' >Next page
|