A 59-year-old male has undergone successful CABG with 4 grafts constructed but remains in low cardiac output (< 2L/min/m2) postoperatively. The following is/are true:
A.	An inotropic drug should be used initially to increase cardiac output
B.	If low cardiac output persists despite optimal physiological and pharmacological support, a balloon pump (IABP) should be inserted
C.	Decreased cardiac filling pressures suggest the possibility of cardiac tamponade
D.	When IABP is used, the balloon is inflated during diastole
Answer:B
A 59-year-old male has undergone successful CABG with 4 grafts constructed but remains in low cardiac output (< 2L/min/m2) postoperatively. The following is/are true:
A.	An inotropic drug should be used initially to increase cardiac output B.	If low cardiac output persists despite optimal physiological and pharmacological support, a balloon pump (IABP) should be inserted C.	Decreased cardiac filling pressures suggest the possibility of cardiac tamponade D.	When IABP is used, the balloon is inflated during diastole