['Right-sided circulatory failure is a major cause of morbidity in heart transplant and ventricular assist device recipients.', 'Several systems for managing right-sided circulatory failure with use of a right-to-left shunt without need for an oxygenator or systemic heparinization were designed and used clinically.', 'A right-to-left shunt was successfully used to treat severe right-sided circulatory failure in both a transplant and a left ventricular assist device recipient.'] Does desaturated venous-to-arterial shunting reduce right-sided heart failure after cardiopulmonary bypass?