Key result
Long-term hemodialysis is linked to ~14-msec QTc prolongation at 10 years.
Why the study?
QT interval prolongation is closely associated with arrhythmic risk in dialysis patients, but its long-term trajectory after hemodialysis initiation has not been systematically examined.
Observational (n=80)
No
Absolute Event Rate: 450.2% vs 436.2%
p-value: p=<0.001
In hemodialysis patients, the QTc interval undergoes a progressive, long-term prolongation that becomes statistically significant at 10 years, suggesting cumulative electrophysiological remodeling that could aid in cardiovascular risk stratification.
QTc prolongation over 10 years in hemodialysis may signal rising arrhythmic risk; leaves open whether serial monitoring improves stratification.
Cardiovascular disease, particularly sudden cardiac death, remains a major challenge in dialysis patients whose hearts experience ongoing structural, electrophysiological, and neurohormonal stress. Among these alterations, QT interval prolongation-reflecting an imbalance in autonomic regulation-is closely associated with arrhythmic risk. Yet, its long-term trajectory in hemodialysis patients has not been systematically examined. In this study, we evaluated heart rate-corrected QT (QTc) intervals at 1, 4, 7, and 10 years after hemodialysis (HD) initiation in 80 patients. ECGs were obtained immediately before HD sessions, and QTc was calculated using the Bazett formula. Although an overall increasing trend was observed, a statistically significant prolongation was detected only at 10 years by Dunnett-type multiple comparison. These findings provide new insight into the gradual nature of QTc progression in HD patients and may contribute to improved cardiovascular risk stratification in clinical practice.
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Matsumoto et al. (2026) conducted an observational in Hemodialysis (n=80). Long-term hemodialysis vs. 1 year after hemodialysis initiation was evaluated on Heart rate-corrected QT (QTc) interval at 10 years (p=<0.001). Long-term hemodialysis was associated with a significant prolongation of the QTc interval from 436.2 msec at 1 year to 450.2 msec at 10 years after initiation.
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