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  • Title: Thrombus resolution and hemodynamic recovery using ultrasound-accelerated thrombolysis in acute pulmonary embolism.
    Author: Kennedy RJ, Kenney HH, Dunfee BL.
    Journal: J Vasc Interv Radiol; 2013 Jun; 24(6):841-8. PubMed ID: 23601295.
    Abstract:
    PURPOSE: To evaluate retrospectively the safety profile and clinical success of ultrasound-accelerated thrombolysis for acute pulmonary embolism (PE) with a standard lytic infusion protocol. MATERIALS AND METHODS: A retrospective study was performed at a single center treating patients with acute PE between October 2009 and April 2012. On diagnosis of submassive or massive PE by pulmonary computed tomography angiography or ventilation/perfusion scan, all patients received anticoagulation and treatment using the EkoSonic endovascular system (EKOS Corporation, Bothell, Washington). The ultrasound-accelerated thrombolytic infusion catheters were placed into the affected pulmonary arteries to facilitate administration of recombinant tissue plasminogen activator at 0.5-1.0mg/h/catheter. RESULTS: Treatment of 60 patients (35 men, 25 women; age 61 y±16; 53 bilateral PE; 48 submassive PE) resulted in complete thrombus clearance (≥90%) in 57% and near-complete (50%-90%) clearance in 41% of patients after infusion of 35.1 mg±11.1 of recombinant tissue plasminogen activator over 19.6 hours±6.0. Measurements before and after treatment showed a decrease in pulmonary artery pressure (47 mm Hg±15 to 38 mm Hg±12 [systolic], P<.001) and Miller score (25±3 to 17±6, P<.001). There were 57 patients who survived to discharge. All three patients who died in the hospital presented with massive PE. On 90-day follow-up, 56 patients (93%) were alive. CONCLUSIONS: The current study demonstrates effectiveness and safety of ultrasound-accelerated thrombolysis in patients with acute PE with a large thrombus burden.
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