1 INTRODUCTION
A pheochromocytoma is a rare tumor that can cause serious complications during surgery, with 25-50% of hospital deaths in patients with unmanaged or unknown pheochromocytoma occurring during anesthesia induction or other operative procedures.1 Herein, we report emergency aortic valve replacement (AVR) for infectious endocarditis (IE) complicated by a hypertensive crisis due to unsuspected pheochromocytoma.