Determinants of total ischemic time in primary percutaneous coronary interventions: A prospective analysis

Abstract

Objective: To assess the factors contributing to longer total ischemic times in ST elevation myocardial infarction (STEMI) patients undergoing primary percutaneous coronary intervention (PPCI). Methods: Three hundred forty-six patients who underwent PPCI from July 2016 to June 2017 were studied. From time for the patient to recognize the symptoms, time was divided into 11 stages, any reason for delay was observed. Results: Mean window period was 6.7 ± 9.8 hours. Mean time to recognize the symptoms, reach first medical contact and prehospital management were 150.2 ± 140.5 min, 58.5 ± 57.0 min and 36.3 ± 38.0 min, respectively. Mean time for the patients brought in ambulance was 82.4 ± 59.8 min whereas for those transported in other vehicles was 130.4 ± 59.7 min (p = 90 min was 9% (p < 0.05). Conclusions: The main contributor for longer total ischemic time was the time taken for the patient to recognize the symptoms. DTB of <90 min can be achieved with effective hospital strategies. Keywords: Time intervals, Total ischemic time, Primary percutaneous coronary intervention, Door to balloon time