ABBREVIATIONS
Cardiac resynchronization therapy: CRT.
Heart failure: HF.
Left ventricular: LV.
LV ejection fraction: LVEF.
Multipoint pacing: MPP.
LV end-diastolic volume: LVEDV.
LV end-systolic volume: LVESV.
New York Heart Association: NYHA.
Left bundle branch block: LBBB.
Coronary sinus: CS.