Video 26.6 Moderate to severe subvalvar pulmonary (left ventricular outflow tract) obstruction in a 9-month-old boy - modified 4-chamber view
Moderate to severe subvalvar pulmonary (left ventricular outflow tract) obstruction in a 9-month-old boy with situs solitus and levocardia. A modified 4-chamber view showing left ventricular outflow tract obstruction due to systolic anterior motion (SAM) of the mitral valve leaflet and ectopic fibrous tissue. Source: Dr. Luc Mertens, Toronto, ON, Canada. Reproduced with permission of Dr. Mertens.