In a well established dog quit pack part stop (LBBB) model [39, 40], all of us looked at the particular hemodynamic improvement of four epicardial LV pacing sites. Pacing was placed on 7 puppies along with trial and error LBBB in several LV pacing web sites: top, apical side to side wall membrane, middle side to side wall, and base of the lateral wall structure, correspondingly. Whatsoever #links#