Abstract
Background
Primary percutaneous coronary intervention (PPCI) is the standard reperfusion treatment in ST-segment elevation myocardial infarction (STEMI). Intracoronary thrombolysis (ICT) may reduce thrombotic burden in the infarct-related artery, which is often responsible for microvascular obstruction and no-reflow.
Methods
We conducted, according to the PRISMA statement, the largest meta-analysis to date of ICT as adjuvant therapy to PPCI. All relevant studies were identified by searching the PubMed, Scopus, Cochrane Library, and Web of Science.
Results
Thirteen randomized controlled trials (RCTs) involving a total of 1876 patients were included. Compared to the control group, STEMI ICT-treated patients had fewer major adverse cardiac events (MACE) (OR 0.65, 95% CI, 0.48–0.86, P = 0.003) and an improved 6-month left ventricular ejection fraction (MD 3.78, 95% CI, 1.53–6.02, P = 0.0010). Indices of enhanced myocardial microcirculation were better with ICT (Post-PCI corrected thrombolysis in myocardial infarction (TIMI) frame count (MD − 3.57; 95% CI, − 5.00 to − 2.14, P < 0.00001); myocardial blush grade (MBG) 2/3 (OR 1.76; 95% CI, 1.16–2.69, P = 0.008), and complete ST-segment resolution (OR 1.97; 95% CI, 1.33–2.91, P = 0.0007)). The odds for major bleeding were comparable between the 2 groups (OR 1.27; 95% CI, 0.61–2.63, P = 0.53).
Conclusions
The present meta-analysis suggests that ICT was associated with improved MACE and myocardial microcirculation in STEMI patients undergoing PPCI, without significant increase in major bleeding. However, these findings necessitate confirmation in a contemporary large RCT.
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Sophia Alexiou, Dimitrios Patoulias, and George Kassimis. The first draft of the manuscript was written by George Kassimis and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Alexiou, S., Patoulias, D., Theodoropoulos, K.C. et al. Intracoronary Thrombolysis in ST-Segment Elevation Myocardial Infarction Patients Undergoing Primary Percutaneous Coronary Intervention: an Updated Meta-analysis of Randomized Controlled Trials. Cardiovasc Drugs Ther 38, 335–346 (2024). https://doi.org/10.1007/s10557-022-07402-3
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DOI: https://doi.org/10.1007/s10557-022-07402-3