European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery
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Vasoplegic syndrome is a recognized complication following cardiac surgery using cardiopulmonary bypass and is associated with increased morbidity and mortality. In several patients profound post-operative vasodilatation does not respond to conventional vasoconstrictor therapy. Methylene blue has been advocated as an adjunct to conventional vasoconstrictors in such situations. ⋯ However, dosing regimens and protocols need to be clearly defined before widespread routine use. Whether methylene blue should be the first line of therapy in patients with vasoplegia is a matter of debate, and there is inadequate evidence to support its use as a first line drug. More scientific evidence is needed to define the role of MB in the treatment of catecholamine refractory vasoplegia.
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Eur J Cardiothorac Surg · Nov 2005
ReviewRepair of persistent truncus arteriosus with interrupted aortic arch.
The aim of our study was to analyse experience with repair of truncus arteriosus with interrupted aortic arch. ⋯ Primary repair of persistent truncus arteriosus with interrupted aortic arch can be done with low mortality and good mid-term results. Aortic arch reconstruction in isolated low-flow perfusion of the head and the heart influences favourably the postoperative recovery. The main postoperative problems are associated with conduit obstruction and aortic insufficiency.
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Tradition and experience of cardiopulmonary bypass in the hand of cardiac surgeons Led to several spin-offs of this extracorporeal technique. Acute organ support is realized for situations of failing cardiac output, circulatory arrest respectively, of pulmonary failure and of drowning. Extracorporeal circulation is a promising adjunct to aim in better surgical technique and treatment in neurosurgery, thoracic aortic surgery, complex Lung resection, tumor surgery and procedures where safe organ perfusion must be ascertained. ⋯ Replacement of Long lasting periods of chest compression for heart massage is a future perspective if circulation is maintained by transcutaneously adapted miniaturized heart-lung-machine. Long lasting traumatizing mechanical ventilation of a severely diseased lung maybe replaced by extracorporeal lung assistance to give better chances for the lung to recover. Thoughts for these new interdisciplinary duties of cardio surgical units were discussed in the committee for the Symposium for the Future of Cardiac Surgery.
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In highly developed nations, valve surgery will be increasing applied in older people, with more co-morbidities and a higher incidence of concomitant coronary artery disease. Valve surgeons will be facing increased competition from the catheter-based procedures, both for valve repair and replacement; these are already applied clinically, and their numbers will rise in near future. Early mortality in double valve procedures and in combined CABG and valve operations remains substantial, and there is ample room for improvement of surgical results. ⋯ Tissue-engineered valves are being developed, but are not ready for larger clinical trials. Cardiac surgery is undergoing a rapid transformation; radical changes both in scope and workload of cardiosurgical units in Europe can be expected in near future. Socio-economic factors and recent advances in medical technology contribute to these changes.
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Cardiopulmonary bypass and cardioplegic arrest, which allow for support of the circulation and stabilization of the heart during cardiac procedures, are still used for the vast majority of cardiac operations worldwide. However, in addition to a well-recognized systemic inflammatory response, cardiopulmonary bypass and cardioplegic arrest elicit complex, multifactorial vasomotor disturbances that vary according to the affected organ bed, with reduced vascular resistances in the skeletal muscle and peripheral circulation, and increased propensity to spasm in the cardiac, pulmonary, mesenteric and cerebral vascular beds. This article outlines the nature, mechanistic basis, and clinical correlates of the vasomotor alterations encountered in patients undergoing cardiac surgery using cardiopulmonary bypass and cardioplegic arrest.