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Published on: September 22, 2020
The universal classification is an independent predictor of long-term outcomes in acute myocardial infarction
Manuel A Gonzalez1, Dana J Eilen, Rana A Marzouq
1Washington Hospital Center, Georgetown University, Washington, DC 20010, USA. manuel.a.gonzalez@medstar.net
Insights
The Universal Classification (UC) better predicts long-term outcomes for acute myocardial infarction (AMI) patients than the ST-segment classification (STC). Type 2 AMI shows a significantly lower risk of major adverse cardiovascular events (MACE) compared to Type 1 AMI.
Area of Science:
- Cardiology
- Clinical Medicine
- Medical Research
Background:
- Long-term outcomes for acute myocardial infarction (AMI) patients using the Universal Classification (UC) remain underexplored.
- Comparison of UC versus ST-segment Classification (STC) for predicting patient outcomes is needed.
Purpose of the Study:
- To determine if the UC is a superior predictor of long-term outcomes in AMI patients compared to the STC.
- To analyze the prognostic value of different AMI types within the UC framework.
Main Methods:
- A retrospective analysis of 348 AMI patients with a mean follow-up of 30.6 months.
- Primary outcome measured was major adverse cardiovascular events (MACE), a composite of all-cause mortality and recurrent AMI.
Main Results:
- The Universal Classification (UC) independently predicted MACE, outperforming the ST-segment Classification (STC).
- Type 2 AMI demonstrated a significantly lower risk of MACE (HR 0.44) compared to Type 1 AMI.
- Other independent predictors of MACE included peak troponin levels, reduced glomerular filtration rate, and GRACE risk score.
Conclusions:
- The UC is a valuable independent predictor of long-term outcomes in acute myocardial infarction (AMI) patients.
- Type 2 AMI is associated with a substantially lower risk of major adverse cardiovascular events (MACE) than Type 1 AMI.
- Future research should prioritize reporting AMI outcomes stratified by UC types.
Background:
The long-term outcomes of patients with acute myocardial infarction (AMI) according to the universal classification (UC) are unknown. We investigated whether the outcome of these patients is better predicted by the UC than the ST-segment classification (STC).
Methods:
We conducted a retrospective study of 348 consecutive patients with AMI with mean follow-up of 30.6 months. The primary outcome was major adverse cardiovascular events (MACE) [composite of all causes of death and AMI].
Results:
The study included ST-segment elevation (STEMI) = 168 (48%), non-ST-segment elevation (NSTEMI) = 180 (52%), Type 1 = 278 (80%), Type 2 = 55 (15.8%), Type 3 = 5 (1.4%), Type 4a = 2 (0.6%), Type 4b = 5 (1.4%), and Type 5 = 3 (0.9%). During follow-up, 102 (29.3%) patients had MACE, 80 (23%) patients died, and 31 (8.9%) had an AMI. The adjusted risk of MACE was similar for NSTEMI and STEMI (HR 1.26, 95% CI 0.77-2.03, P = .35) but was significantly lower for patients with Type 2 AMI as compared to Type 1 (HR 0.44, 95% CI 0.21-0.90, P= .02). The UC, peak troponin levels, discharge glomerular filtration rate <60 ml/min per 1.73 m(2), and thrombolysis in myocardial infarction risk score were independent predictors of MACE (all, P<.05).
Conclusions:
The UC is an independent predictor of long-term outcomes in AMI patients compared to the STC. Type 2 AMI has less than half the risk of MACE as Type 1 AMI. Future studies should report outcomes of AMI patients according to the UC types.
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