Early Identification And Intervention By Paramedics In ST-Elevation Myocardial Infarction (STEMI): A Systematic Review Of Prehospital Contributions

Q: What is the clinical evidence from this study?

Study design: Systematic Review. Population: ST-elevation myocardial infarction (STEMI). Intervention: Paramedic-led early STEMI interventions vs. Standard care or in-hospital management. Primary outcome: Clinical outcomes including door-to-balloon time and mortality.

Q: What does this research mean for the field?

Paramedic-led prehospital catheterization laboratory activation reduces STEMI treatment delays by 15 to 45 minutes, while early antiplatelet therapy and optimized transport decisions improve survival rates. Novelty: ClaimNovelty.SYNTHESIS. Consensus alignment: ConsensusAlignment.NEUTRAL.

Mohammed Ahmed Omaish, Khamis Ghurmullah Alghamdi, Saeed Mesfer Saeed Alghamdi, Fahad Salim Mobark Alharthi, Saad Saeed Alaklabi; Saad Ayed Alshahrani, Abdullah Mansour Jakhaidb AlShamrani, Ahmed Ali Ahmed Alhutheel, Obaid Abdullha Alshamrani

doi:10.70082/mm7v6a09

May 21, 2025The Review of Diabetic StudiesOpen Access

Early Identification And Intervention By Paramedics In ST-Elevation Myocardial Infarction (STEMI): A Systematic Review Of Prehospital Contributions

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Key result

Paramedic-led STEMI triage and cath-lab activation cuts short-term mortality by ~20%.

Why the study?

STEMI is a time-critical emergency where paramedics' early recognition and intervention may reduce ischemic time and improve outcomes, but synthesis of evidence on their impact was needed.

Does paramedic-led early identification and intervention improve time-to-reperfusion and clinical outcomes in patients with STEMI?

Key Points

To evaluate the clinical impact of paramedic-led identification, prehospital electrocardiogram interpretation, catheterization laboratory activation, and early medical management on outcomes in ST-elevation myocardial infarction.
Searched PubMed, Scopus, Web of Science, and CINAHL for studies published between 2016 and 2025.
Identified and synthesized data from 37 high-quality studies assessing prehospital ECG accuracy, catheterization laboratory activation, transport triage, and time-to-reperfusion metrics.
Paramedics achieved 88–94% sensitivity and 85–96% specificity in 12-lead ECG interpretation, with tele-transmission providing an additional 10–18% improvement in diagnostic accuracy.
Field catheterization laboratory activation reduced door-to-balloon times by 15–45 minutes, while direct bypass of non-PCI facilities saved 20–40 minutes and shortened first medical contact–to–device times by 25–55 minutes.
Paramedic-led pathways reduced short-term mortality by 15–30%, acute heart failure risk by 20–35%, and cardiogenic shock by 13–19%, with early prehospital aspirin administration decreasing mortality by 17%.

Study Design

Type

Systematic Review

Structured PICO

Does paramedic-led early identification and intervention improve time-to-reperfusion and clinical outcomes in patients with STEMI?

P

Population

A systematic review of 37 studies published between 2016 and 2025 evaluating the impact of paramedic-led early identification and intervention in patients with STEMI.

I

Intervention

Paramedic-led early identification and intervention, including prehospital 12-lead ECG acquisition and interpretation, prehospital catheterization laboratory activation, early aspirin administration, oxygen titration, and direct transport to PCI-capable centers.

C

Comparator

In-hospital management or systems without prehospital paramedic-led STEMI activation and interventions.

O

Outcome

Time-to-reperfusion metrics (door-to-balloon time, first medical contact-to-device time) and mortality.hard clinical

Paramedic-led early STEMI interventions, including prehospital ECG interpretation and cath-lab activation, significantly reduce ischemic time and improve survival.

Limitations

Variability in EMS training levels and differences in protocol adoption across regions
Inconsistent access to tele-cardiology technologies and resource limitations in rural areas
Paramedics lacking authority to activate the cath lab in some systems
Challenges in recognizing atypical STEMI presentations, particularly among women, older adults, and patients with diabetes
Variability in EMS training levels
Differences in protocol adoption
Inconsistent access to tele-cardiology technologies
Resource limitations in low-income or rural areas
Challenges in recognizing atypical STEMI presentations

Ask about this paper

Answers are grounded in this paper and cite their sources.

Implication

Paramedic-led STEMI protocols merit routine adoption; confirms mortality benefit and extends evidence across contemporary systems.

Abstract

ST-elevation myocardial infarction (STEMI) remains one of the most time-critical cardiac emergencies, where every minute of delay increases myocardial damage and mortality. Paramedics play a vital role in reducing total ischemic time through early recognition, rapid activation of reperfusion pathways, and timely delivery of evidence-based prehospital interventions. This systematic review synthesizes current evidence on the impact of paramedic-led identification and management of STEMI in improving clinical outcomes. Database searches were conducted in PubMed, Scopus, Web of Science, and CINAHL (2016–2025), identifying studies evaluating prehospital ECG acquisition, STEMI diagnosis accuracy, prehospital activation of catheterization laboratories, early aspirin administration, and time-to-reperfusion metrics. Findings demonstrated that paramedic interpretation of 12-lead ECGs achieved diagnostic accuracy comparable to emergency physicians, significantly reducing door-to-balloon times. Prehospital cath-lab activation reduced treatment delays by 15–45 minutes across multiple systems. Early administration of antiplatelet therapy and optimized transport decisions further improved survival rates and reduced complications. The review concludes that paramedic-led early STEMI interventions are clinically effective and essential for high-performing emergency medical systems. Strengthening education, expanding ECG interpretation autonomy, and adopting tele-cardiology technologies are recommended to further enhance outcomes.

Discussion

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Cite This Study

Alaklabi et al. (2025) conducted a systematic review in ST-elevation myocardial infarction (STEMI). Paramedic-led early STEMI interventions vs. Standard care or in-hospital management was evaluated on Clinical outcomes including door-to-balloon time and mortality. Paramedic-led early STEMI interventions, including prehospital ECG and cath-lab activation, reduced door-to-balloon times by 15-45 minutes and decreased short-term mortality by 15-30%.

synapsesocial.com/papers/6ac1aba6cc6172083c928ad8 https://doi.org/10.70082/mm7v6a09

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Early Identification And Intervention By Paramedics In ST-Elevation Myocardial Infarction (STEMI): A Systematic Review Of Prehospital Contributions

Key Points

Study Design

Structured PICO

Limitations

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

Early Identification And Intervention By Paramedics In ST-Elevation Myocardial Infarction (STEMI): A Systematic Review Of Prehospital Contributions

Key Points

Study Design

Structured PICO

Limitations

Ask about this paper

Implication

Abstract

Discussion

Cite This Study

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