Which monitoring and postoperative care considerations are important following aortic valve replacement surgery, considering the potential complications?
a) Monitor for signs of infection at the insertion site and administer prophylactic antibiotics
b) Monitor for signs of stroke and administer thrombolytic therapy if indicated
c) Monitor for bleeding or hematoma at the insertion site, signs of stroke, and cardiac conduction abnormalities; consider pacemaker placement and implement continuous monitoring if necessary
d) Administer vasopressors to manage systemic vascular resistance and prevent hypotension