The Association between Door-to-Balloon Time of Less Than 60 Minutes and Prognosis of Patients Developing ST Segment Elevation Myocardial Infarction and Undergoing Primary Percutaneous Coronary Intervention

Background. The study aimed to verify the effect of primary percutaneous coronary intervention (PPCI) with < 60 min door-toballoon time on ST segment elevationmyocardial infarction (STEMI) patients' prognoses. Methods. Outcomes of patients receiving PPCI with door-to-balloon time of < 60 min were compared with those of patients receiving PPCI with door-to-balloon time 60-90 min. Result. Totally, 241 STEMI patients (191 with Killip classes I or II) and 104 (71 with Killip classes I or II) received PPCI with door-to-balloon time < 60 and 60-90 min, respectively. Killip classes I and II patients with door-to-balloon time < 60 min had better thrombolysis inmyocardial infarction (TIMI) flow(9.2% fewer patientswith TIMI flow< 3, p = 0.019) and 8.0% lower 30-day mortality rate (p < 0.001) than those with 60-90 min. After controlling the confounding factors with logistic regression, patients with door-to-balloon time < 60 min had lower incidences of TIMI flow < 3 (aOR = 0.4, 95% CI = 0.20-0.76), 30-day recurrent myocardial infarction (aOR = 0.3, 95% CI = 0.10-0.91), and 30-day mortality (aOR = 0.3, 95% CI = 0.09-0.77) than those with 60-90 min. Conclusion. Door-to-balloon time < 60 min is associated with better blood flow in the infarct-related artery and lower 30-day recurrent myocardial infarction and 30-day mortality rates.