Abstract
For hemodynamic analysis of the cause of decrease in opening angle of aortic Omnicarbon, 15 patients were catheterized in late postoperative period. Three modes of opening were observed; maximal, delayed and lowered opening. Mean values of 21 mm(6 patients) and 23 mm (9 patients) were as follows valve flow were 225ml/sec and 214ml/sec, valve gradient were 25mmHg and 14mmHg, valve area were 1.04cm2 and 1.36cm2. Delayed or lowered opening were observed only if valve flow was less than 200ml/sec. Decrease in valve flow was associtated with decrease in MOA. Decrease in valve area according to decrease in MOA was trivial. In conclusion, delayed or lowered opening of aortic Omnicarbon might be due to decrease in valve flow and decrease in valve area was negligible clinically if MOA was more than 50 degrees.
