Four days after a transmural MI, a 74-year-old man develops hypotension and congestive heart failure. The following is/are true:
A. An intra-aortic balloon pump should be used and cardiac catheterization performed
B. If the infarct was posterior, this is most likely due to a ventricular septal defect
C. Pulmonary wedge pressure tracing of prominent V waves without an O2 step-up suggests papillary muscle rupture
D. Operative repair of a post MI VSD should be delayed to allow strengthening of the myocardium to hold sutures
Answer:A
Four days after a transmural MI, a 74-year-old man develops hypotension and congestive heart failure. The following is/are true:
A. An intra-aortic balloon pump should be used and cardiac catheterization performed B. If the infarct was posterior, this is most likely due to a ventricular septal defect C. Pulmonary wedge pressure tracing of prominent V waves without an O2 step-up suggests papillary muscle rupture D. Operative repair of a post MI VSD should be delayed to allow strengthening of the myocardium to hold sutures