Abstract 10404: Impact of J-wave in Patients With Structural Heart Disease
BACKGROUND: Recent evidence has supported that J-wave (JW) is associated with idiopathic ventricular fibrillation (VF) in patients without structural heat disease (SHD). But, impact of JW in patients with SHD has not been fully evaluated.
METHOD: Eighty-nine consecutive patients who were newly implanted ICD (with or without biventricular pacing) in our hospital for lethal arrhythmias were reviewed for characteristics of JW on ECG. JW was defined as notching, slurring, or J-point elevation >0.1mV in terminal QRS complex above the isoelectric line.
RESULTS: Defined J-wave was observed in 27 patients of all (30.3%). Patients with JW had less often SHD than patients with without JW (51.9% vs. 80.7%, p<0.007). Cardiac events (recurrence of lethal arrhythmia and cardiac death) were observed more often in patients with JW than patients without JW in 2 years (29.9% vs. 13.5%, Log-rank p=0.017). Especially in patients with SHD, cardiac events were observed more often in patients with JW than patients without JW in 2 years (41.7% vs. 12.8%, Log-rank p=0.024). Nevertheless, in patients without SHD, JW was not statistically correlated with cardiac event risk.
CONCLUSION: SHD was less often observed in patients with JW than without JW. In patients with SHD, JW might be associated with increasing cardiac event risk.
- © 2013 by American Heart Association, Inc.