Left-sided PAPVR has been reported to be found more often in adults, whereas right-sided PAPVR is reported more commonly in children. It is unclear if this is because of a higher proportion of symptomatic manifestation of the latter. The left upper lobe vein anomaly is thought to be most common.
Subtypes of a left ventricular diverticulum:
- muscular type
- often originates at the apex and comprises mainly muscular fibers that contract synchronously with the ventricle(which was in our case)
- often associated with other congenital defects
- fibrous diverticulum: composed of mostly fibrous tissue.