What are the four active cardiac conditions to delay/cancel elective surgery?
a) Atrial fibrillation, stable angina, heart murmurs, tachycardia
b) Unstable angina, decompensated heart failure, severe valvular disease, severe arrhythmias
c) Bradycardia, peripheral artery disease, cardiomegaly, myocardial ischemia
d) Cardiac tamponade, myocardial infarction, ventricular septal defect, pulmonary hypertension