Factors associated with delay in transfer of patients with ST-segment elevation myocardial infarction from first medical contact to catheterization laboratory: Lessons from CRAC, a French prospective multicentre registry.

Background: It is critical to minimize the time between the first medical contact and primary percutaneous coronary intervention in patients with ST-segment elevation myocardial infarction.

Aims: To identify factors associated with a delay of>120min between first medical contact and primary percutaneous coronary intervention in patients with ST-segment elevation myocardial infarction.

Methods: Data were analysed from a regional French registry of patients undergoing coronary angioplasty for ST-segment elevation myocardial infarction<24h after symptom onset. Patients (n=2081) were grouped according to transfer times from first medical contact to primary percutaneous coronary intervention:>120min; or≤120min. Independent predictors of delay were identified by univariate and multivariable analyses.

Results: The median transfer time from first medical contact to primary percutaneous coronary intervention was 112min; 892 patients (42.9%) had a transfer time>120min. A delay of>120min was significantly associated with:≥75km distance from interventional cardiology centre at symptom onset (odds ratio 7.9); more than one medical practitioner involved before interventional cardiology centre (odds ratio 4.5); first admission to a hospital without an interventional cardiology centre (odds ratio 2.9); absence of emergency call (odds ratio 1.6); ≥90min between symptom onset and first medical contact (odds ratio 1.3); Killip class at admission>1 (odds ratio 1.8); lateral ischaemia (odds ratio 1.8); diabetes mellitus (odds ratio 1.6); and hypertension (odds ratio 1.3).

Conclusions: In ST-segment elevation myocardial infarction, a transfer time from first medical contact to primary percutaneous coronary intervention of>120min was associated with geographic, systemic and comorbid factors, several of which appear reasonably actionable.