LOOP STRUCTURE FOR POSITIONING A DIAGNOSTIC OR THERAPEUTIC ELEMENT ON THE EPICARDIUM OR OTHER ORGAN SURFACE

摘要

Loop structures and methods for positioning diagnostic and therapeutic elements on the epicardium or other organ surface. A relatively shoter sheath is attached to a handle and a relatively longer shaft comprising spaced electrodes is slidingly disposed within the sheath. The distal tip of the shaft is provided with an eyelet to engage a hook at the distal part of the sheath to releasably connect both distal parts. Then so formed loop can be tightened e.g. around the pulmonary veins and locked when the desired tightness is achieved.