Extracorporeal membrane oxygenation combined with intra-aortic balloon counterpulsation for pheochromocytoma: A case report

Table 2 Cardiac Doppler ultrasound results

Time	LVEF	Left ventricular outflow tract V-max (m/second)
First day	40%-50%	-
Third day	50%	-
Before withdrawing ECMO	56%-62%	1.7-1.9
After withdrawing ECMO	55%-60%	2
Before withdrawing IABP	65%	1.9
After withdrawing IABP	62%	1.8

LVEF: Left ventricular ejection fraction; ECMO: Extracorporeal membrane oxygenation; IABP: Intra-aortic balloon counterpulsation.