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The Comparison between Two Risk Scores as for the Prediction of Coronary Microvascular Obstruction during Primary
Yuyang Xiao1,2, Hua Chen1, Dongxia Liu1
1Hebei General Hospital - Department of Cardiology, Shijiazhuang, Hebei - China.
Insights
Early recognition of coronary microvascular obstruction (CMVO) in ST-elevation myocardial infarction (STEMI) is crucial. This study found that both SAK and ATI scores effectively estimated CMVO risk post-percutaneous coronary intervention (PCI).
Area of Science:
- Cardiology
- Interventional Cardiology
- Cardiovascular Research
Background:
- Coronary microvascular functional and structural obstruction (CMVO) is a complication following ST-segment elevation myocardial infarction (STEMI).
- Current large-scale studies lack definitive therapeutic approaches for CMVO, emphasizing the need for early recognition strategies.
- Objective measurement of CMVO during percutaneous coronary intervention (PCI) is essential for STEMI patient management.
Purpose of the Study:
- To compare the performance of two clinical risk scores (SAK and ATI) against objective Index of Microcirculatory Resistance (IMR) measurement for CMVO detection in STEMI patients undergoing PCI.
- To evaluate the discriminatory performance of SAK and ATI scores in predicting CMVO.
- To assess the impact of CMVO on left ventricular ejection fraction (LVEF) post-PCI.
Main Methods:
- The study included 65 STEMI patients undergoing primary PCI.
- Index of Microcirculatory Resistance (IMR) was measured to categorize patients into Microvascular Obstruction (MO) or Non-Microvascular Obstruction (NMO) groups.
- SAK and ATI predictive scores were calculated for each patient to evaluate CMVO risk.
- Receiver operator characteristic (ROC) curves and area under the curve (AUC) were used to assess the predictive performance of the scores.
- Left ventricular ejection fraction (LVEF) was evaluated by echocardiography seven days post-procedure.
Main Results:
- The incidence of CMVO was 26.15% (17 out of 65 patients).
- There was no significant difference in the AUC between the SAK and ATI risk scores.
- Patients in the NMO group exhibited a higher LVEF compared to the MO group.
Conclusions:
- Both SAK and ATI scores demonstrated good performance in estimating CMVO risk in STEMI patients post-primary PCI.
- These validated risk scores can aid in the early identification of CMVO, guiding clinical management.
- Further research may explore therapeutic interventions based on early CMVO detection.
Background:
For patients with ST-segment elevation myocardial infarction (STEMI) that are suffering from subsequent coronary microvascular functional and structural obstruction (CMVO), no specific and definitive therapeutic approaches of attenuation have been proven valid in up-to-date large-scale tests, which highlights the urge to address its early recognition.
Objectives:
This study aimed to compare the performance of two clinical risk scores with an objective measurement of CMVO during percutaneous coronary intervention (PCI) with STEMI.
Methods:
The Index of Microcirculatory Resistance (IMR) measurement was conducted and the baseline clinical and angiographic parameters were also recorded. The patients were divided into MO (Microvascular obstruction) or NMO (Non-microvascular obstruction) groups according to the post-procedure IMR value. The CMVO risk was evaluated for all participants by SAK and ATI predictive scores, respectively. Each system was calculated by summing the scores of all variables. The receiver operator characteristic (ROC) curves and the area under the curve (AUC) of two risk models were used to evaluate the discriminatory performance. An echocardiography was performed seven days after the procedure to evaluate left ventricular ejection fraction (LVEF). A two-sided P-value of <0.05 was considered statistically significant.
Results:
Among the 65 eligible STEMI patients, 48 patients were allocated in the NMO group and 17 in the MO group, with a CMVO incidence of 26.15%. There was no significant difference in the AUC between both scores. The LVEF evaluated for the NMO group was higher than that of MO group.
Conclusion:
Both SAK and ATI scores performed well in estimating CMVO risk after primary PCI for STEMI patients.
