Role of aspiration and mechanical thrombectomy in patients with acute myocardial infarction undergoing primary angioplasty: An updated meta-analysis of randomized trials

Dharam J. Kumbhani, Anthony A. Bavry, Milind Y. Desai, Sripal Bangalore, Deepak L. Bhatt

Research output: Contribution to journalArticle


Objectives This meta-analysis was designed to update data on clinical outcomes with aspiration thrombectomy or mechanical thrombectomy before primary percutaneous coronary intervention (PCI) compared with conventional primary PCI alone. Background The clinical efficacy of thrombectomy in acute myocardial infarction (AMI) remains uncertain. Methods Clinical trials that randomized AMI patients to aspiration (18 trials, n = 3,936) or mechanical thrombectomy (7 trials, n = 1,598) before PCI compared with conventional PCI alone were included. Results The weighted mean duration of clinical follow-up was 6 months. Aspiration thrombectomy vs. conventional primary PCI (18 trials, n=3,936): Major adverse cardiac events (MACE) (risk ratio [RR]: 0.76; 95% confidence interval [CI]: 0.63 to 0.92; p = 0.006) and all-cause mortality (RR: 0.71; 95% CI: 0.51 to 0.99; p = 0.049) were significantly reduced with aspiration thrombectomy. Beneficial trends were noted for recurrent MI (p = 0.11) and target vessel revascularization (p = 0.06). Final infarct size (p = 0.64) and ejection fraction (p = 0.32) at 1 month were similar. ST-segment resolution (STR) at 60 min (RR: 1.31; 95% CI: 1.16 to 1.48; p <0.0001) and Thrombolysis In Myocardial Infarction blush grade (TBG) 3 post-procedure (RR: 1.37; 95% CI: 1.19 to 1.59; p <0.0001) were both improved with aspiration thrombectomy. Mechanical thrombectomy vs. conventional primary PCI (7 trials, n = 1,598): there was no difference between the mechanical thrombectomy and conventional primary PCI arms in the incidence of MACE (RR: 1.10; 95% CI: 0.59 to 2.05; p = 0.77), mortality (p = 0.57), recurrent MI (p = 0.32), target vessel revascularization (p = 0.19), or final infarct size (p = 0.47). A benefit in STR at 60 min (RR: 1.25; 95% CI: 1.06 to 1.47; p = 0.007), but not TBG 3 (RR: 1.09; 95% CI: 0.86 to 1.38; p = 0.48) was noted. Conclusions Thrombectomy during AMI by manual catheter aspiration, but not mechanically, is beneficial in reducing MACE, including mortality, at 6 to 12 months compared with conventional primary PCI alone.

Original languageEnglish (US)
Pages (from-to)1409-1418
Number of pages10
JournalJournal of the American College of Cardiology
Issue number16
Publication statusPublished - Oct 15 2013
Externally publishedYes



  • meta-analysis mortality myocardial infarction outcomes thrombectomy

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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