Fig. 1From: Mean compression ratio of a self-expandable valve is associated with the need for pacemaker implantation after transcatheter aortic valve replacementThe projection angles were divided into four categories according to the position of the coronary artery and the shape of the sinus. Top left: the left and right coronary sinuses overlap; top right: the right and non-coronary sinuses overlap; bottom left: the non-coronary sinus is in the middle; bottom right: the right coronary sinus is in the middleBack to article page