Shorter Ischaemic Time and Improved Survival with Pre-hospital STEMI Diagnosis and Direct Transfer for Primary PCI

Background We sought to determine if our regional program for pre-hospital STEMI diagnosis and direct transfer for primary PCI (PPCI) was associated with shorter ischaemic times and improved survival compared with ED diagnosis. Methods STEMI diagnosis was made at the scene by pre-hospital ECG or in...

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Published in:Heart, lung & circulation lung & circulation, 2015-03, Vol.24 (3), p.234-240
Main Authors: Farshid, Ahmad, BMBS, Allada, Chris, MBBS, Chandrasekhar, Jaya, MBBS, Marley, Paul, Dip App Sci, McGill, Darryl, MBBS, PhD, O’Connor, Simon, MBBS, Rahman, Moyazur, MBBS, Tan, Ren, MBBS, Shadbolt, Bruce, PhD
Format: Article
Language:English
Subjects:
Aged
Ambulances
Cardiovascular
Electrocardiography
Emergency Medical Services - methods
Female
Hospitalization
Humans
Male
Middle Aged
Myocardial infarction
Myocardial Infarction - diagnosis
Myocardial Infarction - mortality
Myocardial Infarction - surgery
Myocardial reperfusion
Percutaneous Coronary Intervention
Pre-hospital triage
Primary percutaneous coronary intervention
Retrospective Studies
STEMI
Survival Rate
Time Factors
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Summary:Background We sought to determine if our regional program for pre-hospital STEMI diagnosis and direct transfer for primary PCI (PPCI) was associated with shorter ischaemic times and improved survival compared with ED diagnosis. Methods STEMI diagnosis was made at the scene by pre-hospital ECG or in local EDs depending on patient presentation. Ambulance ECGs were transmitted to our ED for cath lab activation. Patient variables and outcomes at 12 months were recorded. Results We treated 782 consecutive patients with PPCI during January 2008-June 2013. Cath lab activation was initiated prior to hospital arrival (pre-hospital) in 24% of cases and by ED in 76% of cases. Median total ischaemic time was 154 min for pre-hospital and 211 minutes for ED patients (p < 0.0001). Mortality at 12 months was 7.9% in the ED group compared with 3.7% in the pre-hospital group (p = 0.036). On multivariate Cox regression analysis including baseline and procedural variables, pre-hospital activation remained an independent predictor of mortality (HR 0.45, 95% CI 0.20-1.0, p = 0.03). Conclusions Pre-hospital diagnosis of STEMI and direct transfer to the cath lab reduced total ischaemic time by 57 minutes and mortality by >50% following PPCI. Further efforts are needed to increase the proportion of STEMI patients treated using this strategy.
ISSN:1443-9506
1444-2892
DOI:10.1016/j.hlc.2014.09.015