RT Journal Article
SR Electronic
T1 Very long-term prognosis in patients with right ventricular apical pacing for sick sinus syndrome
JF Heart
JO Heart
FD BMJ Publishing Group Ltd and British Cardiovascular Society
SP 1493
OP 1499
DO 10.1136/heartjnl-2018-314537
VO 105
IS 19
A1 Kosuke Nakasuka
A1 Kohei Ishibashi
A1 Ayako Kamijima
A1 Tsukasa Kamakura
A1 Mitsuru Wada
A1 Yuko Inoue
A1 Koji Miyamoto
A1 Hideo Okamura
A1 Satoshi Nagase
A1 Takashi Noda
A1 Takeshi Aiba
A1 Satoshi Yasuda
A1 Nobuyuki Ohte
A1 Kengo Kusano
YR 2019
UL http://heart.bmj.com/content/105/19/1493.abstract
AB Objective The impact of right ventricular (RV) apical pacing on very long-term cardiac prognosis is little known. In this study, we retrospectively evaluated the relationship between RV apical pacing and cardiovascular events (CEs) in patients with sick sinus syndrome (SSS) and left ventricular ejection fraction (LVEF) >35%.Methods Total of 532 consecutive pacemaker recipients with SSS and LVEF >35% were divided into two groups according to the mean cumulative per cent RV apical ventricular pacing (mean %VP) (<50%; non-VP group vs ≥50%; VP group) and occurrence of CE was compared using Kaplan-Meier analysis between two groups. Cox hazard model was used to assess predictors of CE after adjusting explanatory variables such as age, atrial fibrillation (AF) and structural heart disease (SHD).Results Mean %VP was 86.0% and 8.2% in VP and non-VP groups, respectively (p<0.001). During mean follow-up of 13.4±7.0 years, CE occurred in 131 patients and more frequently in VP than non-VP group (p<0.001). However, the VP group was no longer associated with CE after taking into account other variables in multivariate analysis, which revealed AF (HR (HR)=2.08), SHD (HR=4.97), low LVEF (HR=0.98 for every 1% increase) and high age (HR=1.03 for every year of age) were independent predictors for CE. Regarding patients with SHD and/or AF and those aged ≥75 years, Kaplan-Meier curves showed both groups had similar prognosis.Conclusions Cardiac prognosis of patients with RV apical pacing was poor, but after adjusting for other predictors of CE, RV apical pacing was not a prognostic factor in patients with SSS with LVEF >35%.