Background:

delayed reperfusion of acute myocardial infarction with ST elevation (STEMI) is a major determinant of its clinical and functional course.

Objective:

to analyze the impact of the direct transfer from home to a center with hemodynamic service on the reperfusion times and in the clinical and echocardiographic evolution of the STEMI.

Method:

a prospective, observational study was designed that included patients with STEMI received at the INCI hemodynamic service for primary coronary transluminal angioplasty (TCA) from 1st.February 2016 to 30th September 2016. Patients were classified in two groups: 1) direct transfer from home to hemodynamic service and 2) transfer from another care center. Pain-first medical contact (FMC) and FMC-device times were evaluated. The short-term clinical evolution, the left ventricular ejection fraction (LVEF) and left ventricular sector contractility score (at 48 hours post admission and at one month) were compared between both groups.

Results:

we included 124 patients, 38 (31%) women, mean age 63.2±13.5 years. FMC-device time accounted for 54.7% of ischemic time. 51 patients (41%) were direct transfer from domicile. The reperfusion time in group 1 was 284 ± 241 min vs. 498 ± 309 min in group 2 (p <0.001), while the FMC-device time of group 1 was 111 ± 76.3 min vs 263 ± 175.1 min of group 2, (p <0.001). There were no significant differences between groups 1 and 2 in relation to LVEF measured at admission (49.5 ± 9.33% vs. 46.5 ± 9.78%) and at one month (53.0 ± -8.5) vs. (50.2 ± 10.5). The initial contractility score was lower in group 1 (1.37 ± 0.39) than in group 2 (1.46 ± 0.31) (p = 0.029), whereas it did not show significant differences in control and at one month (1.23 ± 0.26). 1.34 ± 0.32. The total mortality was 12 patients (9.7%) and 8 patients (6.5%) before 48 hours. The rate of major adverse cardiac events (MACE) did not differ between the two groups.

Conclusion:

the strategy of direct transfer from home to a hemodynamic center is associated with a shorter total ischemic time at the expense of a shorter FMC-device time and a shorter FMC-door time and with a better segmental contractility score.

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