Left ventricular myocardial sinusoids (Q105072)

A congenital cardiac malformation in which there are deep, endothelial lined, blind-ended intramyocardial tunnels communicating with the left ventricular chamber. Additional information: these occur in the setting of aortic atresia or severe left ventricular outflow tract obstruction, intact ventricular septum and a patent mitral valve. These left ventricular sinusoids do not communicate with the coronary arteries. Where connections from the left ventricle to the coronary arteries exist, one should code for 'Congenital coronary artery-to-left ventricular fistula'. This code should not be used for excessive trabeculation, often described as left ventricular non-compaction.