ISSN 1016-5169 | E-ISSN 1308-4488
Archives of the Turkish Society of Cardiology
Relationship of Frontal QRS-T Angle with Coronary Flow Grade and Adverse Events Before Percutaneous Coronary Intervention in Patients with Non-ST-Elevation Myocardial Infarction [Turk Kardiyol Dern Ars]
Turk Kardiyol Dern Ars. 2023; 51(4): 256-265 | DOI: 10.5543/tkda.2022.65627

Relationship of Frontal QRS-T Angle with Coronary Flow Grade and Adverse Events Before Percutaneous Coronary Intervention in Patients with Non-ST-Elevation Myocardial Infarction

Uğur Küçük1, Kadir Arslan1, Uğur Özpınar1, Burak Altun2
1Department of Cardiology, Faculty of Medicine, Canakkale Onsekiz Mart University, Canakkale, Türkiye
2Department of Cardiology, İstanbul Cerrahi Hospital, İstanbul, Türkiye


OBJECTIVE
Electrocardiography is used in the initial risk assessment of patients with non-ST-elevation myocardial infarction. The frontal QRS-T angle is an electrocardiography parameter that may be affected by the alterations in the coronary blood flow. This study aimed to explore the relationship of the frontal QRS-T angle with coronary flow grade and adverse events in non-ST-elevation myocardial infarction patients.


METHODS
A total of 191 non-ST-elevation myocardial infarction patients were divided into 2 groups based on the thrombolysis in myocardial infarction (TIMI) flow level on coronary angiography before revascularization, namely TIMI 0/1 and TIMI 2/3. The frontal QRS-T angle obtained before revascularization was compared between the groups and its relationship with adverse events was examined. In-hospital all-cause mortality, repeat target lesion revascular-ization, new-onset heart failure, ventricular arrhythmias, and atrial fibrillation were defined as adverse events.


RESULTS
Frontal QRS-T angle was wider in the patients with TIMI 0/1 flow compared to the patients with TIMI 2/3 flow (P  <  0.001). The frontal QRS-T angle was determined to be a predictor of TIMI flow grade 0/1 before revascularization in patients with non-ST-elevation myocardial infarction (odds ratio: 1.51; 95% CI: 1.30-1.75; P < 0.001). The frontal QRS-T angle was a predictor of the adverse events during hospitalization in the patients with non-ST-elevation myocardial infarction (odds ratio: 1.11; 95% CI: 1.04-1.19; P = 0.002). The cut-off values of the frontal QRS-T angle for TIMI flow grade and adverse events were determined to be 73.5°, based on receiver operating characteristic curve analysis.


CONCLUSION
Increased frontal QRS-T angle may be a useful electrocardiography parameter for determining TIMI flow grade and the need for an early invasive strategy in patients with non-ST-elevation myocardial infarction.

Keywords: Electrocardiography, Frontal QRS-T angle, NSTEMI, percutaneous coronary intervention

How to cite this article
Uğur Küçük, Kadir Arslan, Uğur Özpınar, Burak Altun. Relationship of Frontal QRS-T Angle with Coronary Flow Grade and Adverse Events Before Percutaneous Coronary Intervention in Patients with Non-ST-Elevation Myocardial Infarction. Turk Kardiyol Dern Ars. 2023; 51(4): 256-265

Corresponding Author: Uğur Küçük, Türkiye
Manuscript Language: English


Journal Metrics

Journal Citation Indicator: 0.18
CiteScore: 1.1
Source Normalized Impact
per Paper:
0.22
SCImago Journal Rank: 0.348

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