Short-term outcome of Manual Thrombus Aspiration for patients Undergoing Primary PCI for Acute STEMI Showing LargeThrombus burden

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Abstract Background Thrombus aspiration (TA) might have a potential role in STEMI patients with heavy thrombus burden. The objective of several prospective trials whether routine TA in STEMI patients, contributes to a reduced mortality. After the first promising results, mainly based on the single center (TAPAS trial), results of the largest randomized trials to date (TASTE) study and (TOTAL) study, have not shown any significant differences in all-cause mortality, re-hospitalizations or stent thrombosis after a maximum of one-year follow-up period Objectives The aim of this prospective study is to study the in-hospital & short term out-come of using manual thrombus aspiration in STEMI patients undergoing primary PCI & showing large thrombus burden. Results The study included 209 patients referred to (CCU) of (Ain Shams University hospitals) with diagnosis of STEMI, who had under-gone primary PCI, with evidence of heavy thrombus burden . All the patients received DAPT, 99% had received GPIIbIIIa antagonists. The patients were divided into 2 groups: group (A) included 73 patients, who had under-gone manual thrombus aspiration followed by PCI to culprit lesion +/- other vessels & and group (B) included 136 patients, who had under-gone primary PCI of culprit lesion+/- other vessels, using the standard technique, without thrombus aspiration, within the period from 11/2016 till 7/2018(21 months),and they were followed up during hospital stay & for one month following hospital discharge. No stents were used in 13.7% of group (A), but no stents were used on 3.7% of group (B) (p value= 0.007). TIMI III flow had been achieved in 94.5% of group (A), 80.1% of group (B)(p value = (0.020) . MBG 3 had been achieved in 82.2% of group (A), 58.1% of group (B) . ST-segment resolution > 70% had been achieved in 8.2% of group (A), that hadnot been achieved in group (B) (p value =0.003). Mortality(among MACE) was the only event detected (p value 0.026). Follow up MACE were statisticalLy significant results (p value=0.022) . Statistically highly significant results regarding, LV systolic function EF %, p vaue= 0.001, had been achieved . Conclusion In STEMI patients with evidence of heavy thrombus burden, a strategy of manual aspiration thrombectomy is valuable in reducing index hospitalization mortality, and 1 month follow-up rates of mortality, TIMI flow, better MBG, ST-segment resolution, in addition to left ventricular systolic function .