الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Background: Recent decades showed steady increase in the number of cases referred for redo cardiac surgery, which are associated with increased risk of morbidity and mortality compared to the first-time operations. We aimed to investigate the risk factors for hospital mortality and morbidity in patients who underwent mitral valve replacements for previous mechanical mitral valve thrombosis.
Methodolgy: Fifty patients underwent the study from Jan. 2014 till Dec. 2017 at Cardiothoracic Department, Ain Shams University. Preoperative, operative, and postoperative data were analyzed and evaluated for risk factors affecting hospital mortality and morbidity.
Results: The hospital mortality was 22%. New York Heart Association functional class, pulmonary hypertension, preoperative ejection Fraction, postoperative neurological event, total bypass time, cross clamp time, and postoperative counseling regarding anticoagulation were found to be the most important risk factors for hospital mortality.
Conclusion: Once significant valve dysfunction is first noted, re-operation should be undertaken to minimize operative risk to avoid mortality and post operative morbidities. Also, The best way to avoid morality and morbidity associated with valve thrombosis, is to avoid it happening in the first place. This can occur by improved patient education and follow up, making PT test affordable and following up the results.