Predictors, treatment, and outcomes of STEMI occurring in hospitalized patients
Xuming Dai1, Prashant Kaul1, Sidney C Smith1
1Division of Cardiology, University of North Carolina, Chapel Hill, NC 27599-7075, USA.
Insights
Early reperfusion therapy significantly improves survival for outpatients with ST-segment elevation myocardial infarction (STEMI). However, inpatient STEMI presents unique challenges and poorer outcomes due to diagnostic delays and less frequent reperfusion.
Area of Science:
- Cardiovascular Medicine
- Emergency Medicine
- Health Systems Research
Background:
- ST-segment elevation myocardial infarction (STEMI) is typically caused by acute coronary artery occlusion.
- Outpatient STEMI management benefits from early reperfusion therapies (fibrinolysis or primary percutaneous coronary intervention), reducing complications and improving survival.
- STEMI systems of care enhance coordination, reducing ischemia time and mortality for outpatients.
Purpose of the Study:
- To investigate the distinct clinical features and outcomes of inpatient STEMI compared to outpatient STEMI.
- To identify factors contributing to the poorer prognosis observed in hospitalized STEMI patients.
Main Methods:
- Comparative analysis of clinical characteristics and outcomes between inpatient and outpatient STEMI cohorts.
- Review of diagnostic and therapeutic pathways for both patient groups.
Main Results:
- Inpatient STEMI patients are generally older, have a higher female-to-male ratio, and present with more comorbidities.
- Outcomes for inpatient STEMI are significantly worse compared to outpatient STEMI.
- Delays in diagnosis and lower rates of reperfusion therapy are likely contributors to adverse outcomes in inpatient STEMI.
Conclusions:
- Inpatient STEMI represents a distinct clinical entity with unique patient demographics and worse prognosis.
- Addressing diagnostic delays and improving reperfusion rates are critical for enhancing outcomes in hospitalized STEMI patients.
- Further research is needed to understand and mitigate the factors contributing to poor outcomes in inpatient STEMI.
Abstract:
ST-segment elevation myocardial infarction (STEMI) is most commonly caused by an acute thrombotic occlusion of a coronary artery. For patients in whom the onset of STEMI occurs outside of hospital (outpatient STEMI), early reperfusion therapy with either fibrinolysis or primary percutaneous coronary intervention reduces complications and improves survival, compared with delayed reperfusion. STEMI systems of care are defined as integrated groups of separate entities focused on reperfusion therapy for STEMI, generally including emergency medical services, emergency medicine, cardiology, nursing, and hospital administration. These systems of care have been successful at reducing total ischaemia time and outpatient STEMI mortality. By contrast, much less is known about STEMI that occurs in hospitalized patients (inpatient STEMI), which has unique clinical features and much worse outcomes than outpatient STEMI. Inpatient STEMI is associated with older age, a higher female:male ratio, and more comorbidities than outpatient STEMI. Delays in diagnosis and infrequent use of reperfusion therapy probably also contribute to unfavourable outcomes for inpatient STEMI.
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