intubation may accentuate any unrecognized preload deficit and further depress the cardiac output. It is plausible that in our patient the use of propofol as induction agent and the addition of positive pressure ventilation may have provided the setting for peripheral vasodilatation, alterations in preload, and finally, the decrease in cardiac output, enough to decrease coronary perfusion pressure. Unrecognized delayed dilated cardiomyopathy has important anesthetic implications, awareness of the potential for this pathophysiology to occur, recognition of its existence and a well-thought anesthetic plan is warranted. Luis M . Zab ala M D M D T ar i q Pa r r ay M D M D