Table 2

Prevalence and Outcomes Related to First-Degree AVB in Heart Failure Studies (Excluding Pacing)

First Author (Year) (Ref. #)Study TypePopulationHFNFirst-Degree AVB (ms)First-Degree AVB, n (%)Age
Mean F/U (Months)Outcomes Related to First-Degree AVBNotes
Park et al. (2013) (9)Registry analysisKorean Heart Failure registry 2004–2009Acute HF LVEF 35% 58% NYHA III/IV1986>200310 (16)7018Adverse in-hospital outcomes when PR >200 ms was combined with QRS ≥120 ms26% had previous history of HF
Schoeller et al. (1993) (50)Prospective studyIDC 1982–1989IDC LVEF <55% NYHA II–IV94>20015 (18)4849First-or second degree AVB increased risk of cardiac death and sudden cardiac death
Xiao et al. (1996) (49)Retrospective analysisRoyal Brompton 1991–1995IDC LVEDd >6.5 cm58Not defined-5854Patients who died or required pacemaker had prolongation of PR during the study period

Values are mean except as noted.

IDC = idiopathic dilated cardiomyopathy; LVEDd = left ventricular end-diastolic diameter; LVEF = left ventricular ejection fraction; other abbreviations as in Table 1.