Hypertrophic Cardiomyopathy and Left Ventricular Outflow Tract Obstruction: Expecting the Unexpected.

Hypertrophic cardiomyopathy is an increasingly recognized clinical disease that carries perioperative risk. Patients may or may not carry a preoperative diagnosis, but provocable left ventricular outflow tract gradients place them at risk for hemodynamic compromise under surgical conditions. Early recognition of obstructive patterns and rapid management alterations in the face of instability are imperative for the treatment of these patients. This review focuses on the diagnostic criteria, risk factors, and management strategies for the perioperative hypertrophic cardiomyopathy patient. Finally, novel diagnostic modalities are discussed.