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QT interval prolongation and heart failure severity: A longitudinal study.
Mani Shankar Pandey1, Jyoti Mani Shankar Pandey2
1Department of Cardiology, Nalanda Medical College and Hospital, Patna, Bihar, India.
Bioinformation
|May 11, 2026
Summary
Prolonged QT interval in heart failure patients indicates worsening disease and increased risk of arrhythmias and death. This finding highlights QT prolongation as a key prognostic marker for heart failure severity.
Area of Science:
- Cardiology
- Clinical Medicine
- Electrophysiology
Background:
- Patients with heart failure (HF), encompassing both HF with reduced ejection fraction (HFrEF) and HF with preserved ejection fraction (HFpEF), face significant risks of life-threatening arrhythmic events and mortality.
- The prognostic value of QT interval prolongation in this vulnerable patient population is not well-established, necessitating further investigation.
Purpose of the Study:
- To investigate the association between QT interval prolongation and clinical outcomes in patients with heart failure.
- To determine if QT interval prolongation serves as a significant prognostic marker for heart failure severity and adverse events.
Main Methods:
- A cohort of heart failure patients (HFrEF and HFpEF) was evaluated.
- Key parameters assessed included QT interval duration, New York Heart Association (NYHA) functional class, left ventricular ejection fraction (LVEF), B-type natriuretic peptide (BNP) levels, and hospitalization records.
Main Results:
- A significant association was observed between a prolonged QT interval and indicators of worsening heart failure.
- Patients with prolonged QT intervals demonstrated increased risks of experiencing arrhythmic events and all-cause mortality.
- The study identified QT interval prolongation as a significant predictor of adverse outcomes in heart failure.
Conclusions:
- QT interval prolongation is a significant prognostic marker in patients with heart failure (HFrEF and HFpEF).
- Monitoring QT interval duration can aid in risk stratification and management of heart failure patients.
- This research advances the understanding of electrophysiological markers in heart failure prognosis.
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