CV High Yield Questions

Question 1

Myocyte Action Potentials

Relative conduction velocities?

Answer 1

bundle of His = Purkinje fibers > atria > ventricles > AV node

Question 2

Preoperative Evaluation

Cardiac Risk Assessment- Indications?

Answer 2

• ejection fraction < 35%
• recent MI: defer surgery for 6 months
• decompensated congestive heart failure (optimize with medication prior to surgery)
• unstable, severe, or progressive angina (perform cardiac catheterization to evaluate for possible coronary revascularization)
• significant arrhythmias
• severe valvular disease