Coronary sinus occlusion after mitral isthmus linear ablation: Unrecognized silent complication after catheter ablation

Abstract

A 56‐year‐old man without any structural heart disease underwent a second ablation procedure for a recurrent atrial tachycardia (AT). He had undergone cryoballoon pulmonary vein isolation, left atrial roof, and mitral isthmus linear ablation of atrial fibrillation 2 years prior. A 6‐Fr duo‐decapolar catheter was inserted into the coronary sinus (CS) from the jugular vein, and an ultrahigh resolution mapping