Electrocardiographic algorithms for predicting the complexity of coronary artery lesions in ST-segment elevation
Kai-Hung Cheng1, Chih-Sheng Chu, Kun-Tai Lee
1Department of Cardiology, Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
Insights
This study presents an electrocardiogram (ECG) algorithm to predict three-vessel disease (3VD) in ST-elevation myocardial infarction (STEMI) patients. Early identification of complex coronary artery lesions aids in selecting the optimal reperfusion strategy.
Area of Science:
- Cardiology
- Medical Diagnostics
- Interventional Cardiology
Background:
- ST-elevation myocardial infarction (STEMI) management requires timely reperfusion.
- Identifying multivessel coronary artery disease (CAD) is crucial for treatment decisions in STEMI, especially with cardiogenic shock.
- Predicting coronary artery lesion complexity from electrocardiogram (ECG) findings in STEMI is not well-established.
Purpose of the Study:
- To develop and validate a sequential ECG algorithm for predicting three-vessel disease (3VD) in STEMI patients.
- To assess the algorithm's sensitivity and specificity in identifying complex CAD.
- To facilitate early and appropriate reperfusion strategy selection in STEMI.
Main Methods:
- Retrospective analysis of 12-lead ECG parameters in STEMI patients undergoing primary percutaneous coronary intervention within 12 hours.
- Development of a sequential ECG algorithm to predict 3VD based on specific ST-segment and wave characteristics in different leads.
- Validation of the algorithm's diagnostic performance (sensitivity and specificity).
Main Results:
- For inferior STEMI, a two-step ECG criteria identified 3VD with 92.1% sensitivity and 81.8% specificity.
- For anterior STEMI, an ECG algorithm identified 3VD with 76.5% sensitivity and 100% specificity.
- The complete algorithm achieved 88.4% sensitivity and 100% specificity for detecting 3VD in STEMI patients.
Conclusions:
- An ECG-based algorithm can effectively distinguish three-vessel disease (3VD) from single-vessel disease in STEMI patients.
- Early identification of 3VD using ECG can guide the selection of appropriate reperfusion strategies.
- This non-invasive tool may improve treatment planning for STEMI patients with complex CAD.
Objective:
In reperfusion strategy for ST-elevation myocardial infarction (STEMI), emergency surgical bypass grafting might be considered for patients with significant multivessel coronary diseases complicated by cardiogenic shock. The culprit lesions in STEMI can be predicted from electrocardiographic (ECG) findings. However, whether the complexity of coronary artery lesions in STEMI can be predicted from characteristic ECG findings remained unclear.
Materials And Methods:
The initial 12-lead ECG parameters in each lead recording from patients with STEMI receiving primary percutaneous coronary intervention within 12 hours were retrospectively analyzed. A sequential ECG algorithm was developed to predict the complexity of coronary artery lesions.
Results:
In patients with inferior wall STEMI, the presence of the following 2-step criteria indicated 3-vessel disease (3VD), with a sensitivity of 92.1% and a specificity of 81.8%: (1) ST depression or flat T wave in leads V5 or V6; and (2) ST elevation of more than 2 mm in at least 1 of II, III, aVF, or Q (loss of septal r) without ST elevation in aVR. In patients with anterior wall STEMI, the following criteria indicated 3VD: (1) ST elevation of more than 4 mm in at least 1 of the precordial leads and combined with QRS interval of more than 120 ms; then (2) a flat T wave over aVR, or aVL combined with flat T wave ST depression over lead I or Q wave over all leads II, III, and aVF. This algorithm detects patients with 3VD with a sensitivity of 76.5% and a specificity of 100%. However, when the whole algorithm is completed, the sensitivity can reach up to 88.4% and the specificity can still be 100%.
Conclusion:
By using this ECG algorithm, 3VD might be distinguished early from single-vessel disease in patients with STEMI for appropriate reperfusion strategy.
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