J Thorac Cardiovasc Surg 2010;139:234-236
© 2010 The American Association for Thoracic Surgery
Letter to the Editor
a Division of Cardiothoracic Surgery, University of Miami Miller School of Medicine and Jackson Memorial Hospital, Miami, Fla
b Department of Anesthesiology, University of Miami Miller School of Medicine and Jackson Memorial Hospital, Miami, Fla
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To the Editor:
During cardiac surgery with cardiopulmonary bypass (CPB), the surgeon is assured that all organs are perfused and/or protected. The heart—lung machine provides perfusion to all organs while the heart is either cardioplegically arrested or perfused.1 One assumes that the lungs are perfused, although pulmonary artery blood flow, the major source of blood supply to the lungs, ceases. Discontinuation of pulsatile flow and low mean pressures further accentuate decreased bronchial artery flow. The lung is the "target" organ, especially during prolonged CPB. Severe pulmonary dysfunction, manifested as poor gas exchange, pulmonary edema, and prolonged need for artificial ventilation, are consequences.
Imura and associates2 correlated low-frequency mechanical ventilation during CPB in pigs with suppression of
J. Thorac. Cardiovasc. Surg. 2010 139: 236-237.
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