Use of Intraoperative Dobutamine Stress Echocardiography on Outcomes of Septal Myectomy

In this series, 43% of patients had occult left ventricular outflow gradients after induction of anesthesia. Intraoperative stress echocardiography during septal myectomy is useful to unmask occult gradients and confirm adequate myectomy. This imaging strategy is associated with reliable relief of obstruction and mitral regurgitation as demonstrated at 60-day follow-up.