. "Cardiopulmonary bypass" . . "Open-heart bypass" . "extracorporeal circulation" . "heart\u2013lung machine" . "cardiopulmonary bypass" . "heart-lung bypass" . . . "Cardiopulmonary Bypass (CPB)" . . "heart\u2013lung bypass machine" . "cardio-pulmonary bypass" . "bypass" . . "heart-lung preparation" . . "bypass surgery" . . "heart and lung machine" . "Heart Bypass Surgery" . . . . . "centrifugal-flow blood pump" . "heart-lung machines" . . "cannulae" . "heart bypass" . . . "artificial lung and heart machine" . . . . "cardiopulmonary bypass (CPB)" . . . "artificial heart-lung machine" . . . "heart-lung machine" . "Heart/Lung bypass" . "Cardiopulmonary bypass" . . . . . . "heart\u2013lung machines" . "heart-lung bypass machine" . . "Heart-lung machines" .