Device implantation
A biventricular pacemaker with implantable defibrillator with the MPP
feature was implanted in all patients together with a quadripolar LV
lead (Quartet®, Abbott, Sylmar, CA). Immediately after implant and
before discharge, if at least 2 MPP vectors options were available the
MPP algorithm was turned ON. Investigators programmed devices and MPP
based on their discretion. However, MPP configuration was recommended
following one of the 2 different approaches:
Anatomical approach: choose the most anatomically separated vectors
based on the position of each electrode, documented through
fluoroscopic images.
Electrical approach: choose the most electrically separated vectors
based on the data provided by the Conduction Delay Test (based on RV
paced to LV sensed).