Breaching septal veins while attempting left bundle branch area pacing. If necessary, septography contrast should be injected in a stepwise approach

Permanent transseptal left bundle branch area pacing (LBBAP) is a promising technique developed to avoid the detrimental effects of pacing‐induced dyssynchrony with right ventricular (RV) pacing, by offering more physiologic activation of the heart. Lesions to tributary veins of the coronary sinus have been increasingly reported, mostly associated with venous fistula or venous septal system infringement. Despite being mostly benign, venous complications may be related to the maneuver of contrast injection through the sheath and failure to follow simple but essential steps.