AF, atrial fibrillation; AS, aortic stenosis; AVB, atrioventricular
block; BBB, bundle branch block; BiVp, biventricular pacing; Ca, cancer;
CCF, prior congestive cardiac failure; CHB, complete heart block; CKD,
chronic kidney disease; CRT, cardiac resynchronization therapy; DM,
diabetes mellitus; ECG, 12 lead electrocardiogram; HLD, hyperlipidemia;
HTN, hypertension; ICD, implantable cardiac defibrillator; IHD, ischemic
heart disease; IVCD, intraventricular conduction delay; LA, left atrium;
LAFB, left anterior fascicular block; LBBP, left bundle branch pacing;
LBBB, left bundle branch block; LV. Left ventricle; LVEF, left
ventricular ejection fraction; min, minutes; MR, mitral regurgitation;
ms, milliseconds; mV, millivolts; MV, mitral valve; MVP, mitral valve
prolapse; NICMP, non-ischemic cardiomyopathy; PPM, permanent pacemaker;
QRSd, QRS duration; RBBB, right bundle branch block; RV, right
ventricle; s/p, status post; SAVR, surgical aortic valve replacement;
SMAC, simple mastectomy and axillary clearance; SSS, sick sinus
syndrome; SVC, superior vena cava; Tachy-brady, tachycardia bradycardia
syndrome; TAVI, transcatheter aortic valve implantation; TR, tricuspid
regurgitation; VT, ventricular tachycardia.
† Reason for each unsuccessful LBBP attempt has been previously
described in the “Case Series” section.