Assessment of prognostic factors in patients undergoing surgery for non-rheumatic mitral regurgitation.

摘要: Twenty-four patients who had undegone mitral valve surgery for pure non-rheumatic regurgitation were studied non-invasively six months to years postoperatively. The long-term results of operation assessed on the basis clinical history, echocardiography, and treadmill stress testing using a points scoring system. score so obtained was used divide into those with good response (group 1) responding poorly 2). effects surgical outcome several intraoperative preoperative factors then analysed both together separately. A short symptomatic history (less than 1 year), normal left ventricular end-diastolic volume index or equal 100 ml per m2), large post-ectopic potentiation KV max (greater 50 s-1) found be favourable prognostic when independently. An angiographic ejection fraction less 0.5 uniformly associated poor outcome, 71 cent in atrial fibrillation at time also responded badly. In function, cold potassium cardioplegia more commonly intermittent aortic cross clamping as means myocardial preservation, though this difference did not reach conventional significance. standard analysis variance allowed assessment length index, type prosthesis simultaneously. This indicated that highly significant factors. use Bjork-Shiley opposed Starr-Edwards emerged significantly favouring result. state myocardium before thus shown prime determinants these patients. optimum within one year onset symptoms, exceeds m2, falls 0.5. At such time, irreversible changes function sufficient negate beneficial have yet occurred.