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First use of large-bore suction thrombectomy for acute pulmonary embolism in Asia-Pacific: feasibility and short-term clinical outcomes.
Journal of Thrombosis and Thrombolysis 2023 April 6
Clinical outcomes for intermediate or high-risk pulmonary emboli (PE) remain sub-optimal, with limited improvements in survival for the past 15 years. Anticoagulation alone results in slow thrombus resolution, persistent right ventricular (RV) dysfunction, patients remaining at risk of haemodynamic decompensation and increased likelihood of incomplete recovery. Thrombolysis elevates risk of major bleeding and is thus reserved for high-risk PE. Thus, a huge clinical need exists for an effective technique to restore pulmonary perfusion with minimal risk and avoidance of lytic therapy. In 2021, large bore suction thrombectomy (ST) was introduced in Asia for the first time and this study assessed the feasibility and short-term outcomes of Asian patients undergoing ST for acute PE. 40 consecutive patients (58% male, mean age of 58.3 ± 16.6 years) with intermediate (87.5%) or high-risk PE (12.5%) were enrolled in this prospective registry. 20% had prior VTE, 42.5% had contraindications to thrombolysis, and 10% failed to respond to thrombolysis. PE was idiopathic in 40%, associated with active cancer in 15% and post-operative status in 12.5%. Procedural time was 124 ± 30 min. Emboli were aspirated in all patients without the need for thrombolytics, resulting in a 21.4% reduction in mean pulmonary arterial pressures and 123% increase TASPE-PASP ratio, a prognostic measure of RV-arterial coupling. (both p < 0.001) Procedural complications were 5% and 87.5% patients survived to discharge without symptomatic VTE recurrence during 184 days of mean follow-up. ST affords an effective reperfusion option for PE without thrombolytics, normalises RV overload and provides excellent short-term clinical outcomes.
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