Quartet Lead With Defibrillator Multisite Algorithmic Cardiac Resynchronisation Therapy Optimisation

Use of a computer algorithm to run through multiple combinations of pacing options in patients who have a Cardiac resynchronisation pacemaker with defibrillator where a quadripolar lead has been implanted. These quadripolar leads offer extra options for pacing locations across the heart, as well as for different combinations and sequences of pacing stimuli.