Fig. 1.

A. Cable externalization between both coils (zones A1-A2). Yellow arrow indicates the affected area. Fig. 1B. Cable externalization sub-classified according to the topography of the mechanical dysfunction: D, clavicle to pulse generator; C, near clavicle; B, distal to clavicle including SVC-coil; A, distal to SVC-coil. In turn, that area between both coils is divided into: SVC-coil to the tricuspid valve annulus (A3); just in the tricuspid valve annulus level (A2); tricuspid valve annulus to the right ventricle-coil (A1) [14]. SVC, superior vena cava.