Novel predictor for new-onset atrial high-rate episode in patients with
dual-chamber implantable cardiac devices
Abstract
Introduction The incidence of new-onset atrial high-rate episode (AHRE)
is higher among patients with cardiac implantable electronic devices
(CIEDs) than in the general population. We sought to elucidate the
clinical factors including P-wave dispersion (PWD) in sinus rhythm
associated with AHRE in CIED patients. Methods and results One hundred
one patients with newly implanted CIEDs from 2010 to 2014 at our
institute were included. PWD was measured at the time of device
implantation via a body-surface electrocardiogram. AHRE was defined as
any episode of sustained atrial tachyarrhythmia (>170 bpm)
recorded in the device’s memory. Patients were divided into an AHRE
group (n=34) and non-AHRE group (n=67) in accordance with the presence
or absence of AHRE within one year of device implantation and compared.
The mean age was 75 ± 11 years old. A greater incidence of sick sinus
syndrome (p=0.05) and longer PWD (62.6 ± 13.1 vs. 38.2 ± 13.9 ms;
p<0.0001) were apparent in the AHRE group. Multivariate
analysis revealed that PWD was an independent predicting factor for
new-onset AHRE (odds ratio: 1.11; 95% confidence interval: 1.06–1.17;
p<0.0001). In the logistic regression analysis, the
receiver-operating characteristic curve (area under the curve: 0.90;
p<0.001) suggested the best cutoff value for PWD was 48 mm,
achieving a sensitivity of 73.8% and specificity of 77.9%. Conclusion
PWD is a simple but feasible predictor for new-onset AHRE in patients
with cardiac implantable electronic devices.