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Plaque characteristics in patients with ST-segment elevation myocardial infarction and early spontaneous reperfusion
Jincheng Guo1, Jun Chen, Guozhong Wang
1Department of Cardiology, Beijing Luhe Hospital, Capital Medical University, Beijing, China.
Insights
Early spontaneous reperfusion (ESR) in ST-elevation myocardial infarction (STEMI) patients often involves non-ruptured plaques. This suggests plaque characteristics, not just rupture, influence spontaneous blood flow recovery.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Biology
Background:
- Early spontaneous reperfusion (ESR) is a recognized clinical occurrence in patients with ST-elevation myocardial infarction (STEMI).
- Understanding the mechanisms driving ESR is crucial for optimizing treatment strategies.
Purpose of the Study:
- To investigate the underlying mechanisms of ESR in patients diagnosed with STEMI.
- To identify specific plaque characteristics and thrombus burden associated with ESR.
Main Methods:
- A prospective study involving 241 STEMI patients undergoing optical coherence tomography (OCT).
- Patients were categorized based on angiographic ESR criteria (TIMI 3 flow).
- A control group without ESR was selected using propensity score matching.
Main Results:
- Non-ruptured plaques were more prevalent (62.2%) in the ESR group compared to the control group (35.6%).
- Plaque rupture (37.8% vs 64.4%) and red thrombus (44.4% vs 77.8%) were significantly less common in patients with ESR.
- Fewer emergent stent placements were required in the ESR group (68.9% vs 91.1%).
Conclusions:
- Non-ruptured plaques may play a significant role in facilitating ESR in STEMI patients.
- The absence of plaque rupture and reduced thrombus burden are associated with spontaneous reperfusion.
Background:
Early spontaneous reperfusion (ESR) is not an uncommon phenomenon in clinical settings.
Aims:
The aim of this study was to detect potential mechanisms of ESR in patients with STEMI.
Methods:
This prospective study enrolled a total of 241 consecutive patients with STEMI undergoing optical coherence tomography (OCT) from July 2016 to August 2019. Forty-five patients (18.7%) met angiographic ESR criteria (TIMI 3 flow on the initial angiogram). Among those without ESR (TIMI 0 flow on initial angiogram), 45 patients were assigned to the control group according to propensity score matching with the ESR group.
Results:
Although the baseline characteristics of the groups were comparable, non-ruptured plaque (62.2% vs 35.6%) predominated and plaque rupture (37.8% vs 64.4%) was less common in the ESR group (p=0.011). Red thrombus (44.4% vs 77.8%) was also less common in the ESR group (p=0.001). Lastly, compared to the control group, the ESR group underwent fewer emergent stent placements (68.9% vs 91.1%, p=0.008).
Conclusions:
Relief of coronary occlusion induced by a non-ruptured plaque may contribute to ESR in patients with STEMI.
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