Francesco Nappi1, Sanjeet Singh Avataar Singh2. 1. Department of Cardiac Surgery, Centre Cardiologique du Nord de Saint-Denis, 36 Rue des Moulins Gémeaux, 93200 Saint-Denis, France. Electronic address: francesconappi2@gmail.com. 2. Department of Cardiothoracic Surgery, Golden Jubilee National Hospital, Glasgow, United Kingdom.