Published in:
Open Access 01-12-2020 | ST-Segment Elevation Myocardial Infarction | Research article
The role of late reperfusion in ST-segment elevation myocardial infarction: a real-world retrospective cohort study
Published in: BMC Cardiovascular Disorders | Issue 1/2020
Login to get accessAbstract
Background
Early reperfusion of the coronary artery has become the first choice for patients with ST-segment elevation myocardial infarction (STEMI). How to deal with patients who miss the time window for early reperfusion is still controversial. Based on real-world data, this study was conducted to explore whether percutaneous coronary intervention (PCI) has an advantage over standard drug therapy in patients who miss the optimal treatment window.
Methods
Consecutive patients who were diagnosed with STEMI and met the inclusion criteria between 2009 and 2018 in our center were retrospectively included in this cohort study. The primary endpoint events were major adverse cardiac events (MACEs), including heart failure, sudden cardiac death, malignant arrhythmia, thrombi and bleeding events during the period of admission. Secondary endpoint events were components of MACEs. At the same time, we also evaluated angina pectoris at admission and discharge through Canadian Cardiovascular Society (CCS) grading.
Results
This study enrolled 417 STEMI patients and divided them into four groups (PCI < 3 days, 14.87%; 3 days<PCI < 7 days, 21.104%; PCI > 7 days, 34.29%; MED, 29.74%). During the period of admission, MACEs occurred in 52 cases. The incidence of MACEs was 11.29, 7.95, 4.20 and 25.81% in the four respective groups (p < 0.0001). The MED group had higher rates of MACEs (OR = 3.074; 95% CI 0.1.116–8.469, p = 0.03) and cardiac death (OR = 3.027; 95% CI 1.121–8.169, p = 0.029) compared to the PCI group. Although both treatments were effective in improving CCS grade at discharge, the PCI group improved more significantly (p < 0.0001).
Conclusions
In the real world, delayed PCI can be more effective in patients with angina symptoms at discharge and reduce the incidence of MACEs and cardiac death during hospitalization. The timing of intervention was independent of the occurrence of MACEs during hospitalization and of improvement in symptoms.