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Background and Aim: Attempting to place an aortic cross-clamp may complicate surgery and postoperative outcomes in patients who have mediastinal adhesions or in those with extensive aortic calcification. Although right-sided cardiac surgery via thoracotomy is not a new technique in these patients, robotic-assisted intracardiac repair without cross-clamping was not reported in a large group of patients previously. In this study, the safety of robotic-assisted cardiac surgery without aortic cross-clamping was examined.Methods: From January 2010 to March 2020, 304 patients underwent robotic-assisted cardiac surgery in our center and in 25 of these patients (8.2%) with a mean age of 65.5 ± 20 years myocardial protection was succeeded with moderate hypothermic ventricular fibrillatory arrest. Severe pericardial adhesions or existence of highly calcified ascending aorta were the indications for fibrillatory arrest during robotic assistant surgery.Results: Most patients were in New York Heart Association Class ≥II (88.0%) and the mean logistic Euroscore value was 18.5 ± 22.3. The type of operations were mitral/tricuspid valve repair/replacement, cryoablation, atrial septal defect closure, and pericardiectomy. Cardiopulmonary bypass times were 141.5 ± 47 (minimum 77-maximum 252) min. There was no case of conversion to open thoracotomy or sternotomy. Hemiparesis was observed in one patient. Two patients with 78.2 and 81.9 Euroscore values had mesenteric ischemia and multiorgan failure, respectively, and died at postoperative period.Conclusions: Robotic-assisted cardiac surgery without cross-clamping may provide reasonable outcomes in patients with severe aortic calcification or mediastinal adhesions undergoing intracardiac repair. These acceptable outcomes may encourage surgeons to perform this approach in appropriate group of patients. [ABSTRACT FROM AUTHOR]

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