| COVID-19 | CoronaVirus Disease-19 |
| IRR | Incidence Rate Ratio |
| LVEF | Left ventricular ejection fraction |
| ACS | Acute coronary syndrome |
| ED | Emergency department |
| OR | Odds ratio |
| MD | Mean difference |
| CI | Confidence interval |
| SD | Standard deviation |
| STEMI | ST-segment elevation myocardial infarction |
| NSTEMI | Non-ST-segment elevation myocardial infarction |
| MI | Myocardial infarction |
| HI | High income |
| UMI | Upper–middle income |
| LMI | Lower–middle income |
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