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Original Article
The relationship between QT dispersion, fragmented QRS, and collateral circulation in patients with chronic total coronary artery occlusion
Abstract
Aims: Corrected QT dispersion (QTcD), prolonged QT dispersion (QTD), and fragmented QRS (fQRS) are known as indicators of high risk for cardiac arrhythmias. Within this context, our research was conducted to assess the role of coronary collateral circulation (CCC) on QTD and fQRS in participants with chronic total coronary artery occlusion.
Methods: This study examined 131 participants with CCC in total. The participants were divided into two groups based on the Rentrop classification: group 1 (Rentrop 0 and 1) and group 2 (rentrop 2 and 3). Demographic data, laboratory results, and electrocardiogram findings were analyzed retrospectively.
Results: Significantly, variability was observed between the poor and good collateral groups in terms of QTcD (91.3±21.6 vs 57.2±26.2, p<0.001), QTD (87.6±21.3 vs. 55.2±26.2, p<0.001), and the presence of fQRS (139.5±8.0 vs. 128.1±13.1, p<0.001). Correlation analysis indicated a significant connection between the Rentrop classification and diabetes mellitus, creatinine levels, QTD, QTcD, and the existence of fQRS.
Conclusion: Poorly developed CCC was associated with increased QTcD, QTD, and the presence of fQRS. These parameters QTD, QTcD, and fQRS may serve as important, easily accessible, and effective tools in predicting the quality of CCC in individuals with coronary artery disorder. Nevertheless, these outcomes should be investigated through further research.

Keywords : Fragmented QRS, coronary collateral circulation, QT dispersion

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Article available in :
Volume 8, Issue 2, 2025
Page : 356-360
https://doi.org/10.32322/jhsm.1627315
Article Information
Received : 26 Oca 2025
Accepted : 16 Mar 2025
Published : 21 Mar 2025
Corresponding Author :

Serdar Gökhan Nurkoç: Department of Cardiology, Yozgat City Hospital, Yozgat, Turkiye

[email protected]
Citation : Nurkoç SG, Karayiğit O, Günay İ. The relationship between QT dispersion, fragmented QRS, and collateral circulation in patients with chronic total coronary artery occlusion. J Health Sci Med. 2025;8(2):356-360.

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