Severe subvalvular pulmonic stenosis due to a ball-shaped accessory tissue in an asymptomatic woman with congenitally corrected transposition of great arteries and mesocardia: A rare case report.

Severe subvalvular pulmonic stenosis due to a ball-shaped accessory tissue in an asymptomatic woman with congenitally corrected transposition of great arteries and mesocardia: A rare case report.