Abbreviations
AF: Atrial fibrillation
CIED: Cardiac implantable electronic device
CRT: Cardiac resynchronisation therapy
CRTD: Cardiac resynchronisation therapy defibrillator
CS: Coronary sinus
HF: Heart failure
LV: Left ventricular
LVEF: Left ventricular ejection fraction
NYHA: New York Heart Association functional classification
RV: Right ventricular