Factors Associated with Arrhythmia in Patients with ST Segment Elevation Myocardial Infarction: A Single-Center Cross-Sectional Study
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Abstract
Background: Arrhythmia is a common and clinically significant complication during hospitalization for ST-segment elevation myocardial infarction (STEMI). This study aimed to identify factors associated with the occurrence of arrhythmia in the acute phase of STEMI.
Methods: This single-center cross-sectional study was conducted among adult patients hospitalized with STEMI. Demographic and clinical variables, including cardiovascular risk factors and disease severity (Killip class, Thrombolysis in Myocardial Infarction [TIMI] score, and Global Registry of Acute Coronary Events [GRACE] score), were obtained from medical records. The primary outcome was in-hospital arrhythmia, defined as documented atrial or ventricular tachyarrhythmia or clinically significant bradyarrhythmia. Factors associated with arrhythmia were assessed using bivariate analyses followed by multivariable logistic regression.
Results: This study involved 113 patients, with a mean age of 56.4 (11.1) years. Arrhythmia occurred in 26.5% (30 patients) during hospitalization. In bivariate analyses, arrhythmia was associated with higher Killip class (P<0.001), higher TIMI score (P=0.005), higher GRACE score (P=0.001), lower tricuspid annular plane systolic excursion (P=0.002), elevated serum potassium level (P=0.010), and impaired renal function, reflected by higher urea (P=0.005) and creatinine levels (P = 0.004). After multivariable adjustment, only Killip class remained independently associated with arrhythmia: patients presenting with Killip class I had a significantly lower risk of arrhythmia than those with higher Killip classes (adjusted OR, 0.404; 95% CI, 0.20 to 0.80; P=0.009).
Conclusion: In hospitalized patients with STEMI, arrhythmic risk is chiefly driven by early clinical severity. Killip class is a simple bedside predictor of in-hospital arrhythmia and can aid early risk stratification and monitoring.
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| Files | ||
| Issue | Vol 21 No 1 (2026) | |
| Section | Original Article(s) | |
| DOI | https://doi.org/10.18502/jthc.v21i1.21280 | |
| Keywords | ||
| Arrhythmia STEMI TAPSE Killip class Echocardiography | ||
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