January 10, 2026BMC Cardiovascular Disorders0 citationsOpen Access

The relationship between 24-hour QT interval variability and heart rate variability in patients with acute myocardial infarction and the occurrence of major cardiovascular adverse events after PCI surgery

Key Result

24-hour QT interval variability significantly predicts major cardiovascular adverse events post-PCI in patients with acute myocardial infarction.

Key Points

The research aims to investigate the relationship between QT interval variability and heart rate variability in patients with acute myocardial infarction after PCI.
Analyzed QT interval variability and heart rate variability in patients post-PCI.
Identified occurrences of major cardiovascular adverse events (MACE).
Utilized statistical methods to assess risk factors.
QT interval variability is a significant predictor of MACE after PCI.
Higher variability correlates with an increased risk of adverse cardiovascular events.

Structured PICO

Does 24-hour QT interval variability predict the occurrence of major cardiovascular adverse events in patients with acute myocardial infarction after PCI?

Population

238 patients diagnosed with acute ST-segment elevation myocardial infarction or non-ST-segment elevation myocardial infarction who received PCI treatment within 24 hours of illness onset, aged 18 to 80 years. Exclusions included electrocardiographic abnormalities, prior antiarrhythmic drug use, bleeding tendency, and other cardiovascular surgeries within the previous 3 months.

Intervention

24-hour continuous electrocardiogram monitoring using a cardiovascular function monitoring device to assess QT interval variability (QTV) and heart rate variability (HRV) within 24 hours before and after PCI surgery.

Outcome

Occurrence of major cardiovascular adverse events (MACE) within two years post-procedurecomposite

Main Result

Absolute Event Rate: 0% vs 0%

Abstract

QTV is a significant predictor of MACE post-PCI in AMI patients, underscoring its potential utility in post-procedural monitoring and risk stratification.

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