The ligament of Marshall is an epicardial vestigial fold that contains the vein of Marshall and a myocardial sleeve called the Marshall bundle (MB). If the MB epicardial connections bypassing endocardial mitral isthmus (MI) are present, it should be blocked to achieve a complete MI block. We report the first case to create the MB conduction block by disconnecting the coronary sinus–MB connections.

Chris Marshall Chris Marshall, who died on August 8 at age 66, was a world-renowned cell biologist best known for his pioneering contributions to oncogene research and to cell signaling via GTPases, especially to our understanding of tumor cell signaling through the Ras-Raf-Mek-Erk pathway. He spent the whole of his independent research career at the Chester Beatty Laboratories of the Institute...