Key result
Ultrasound-assisted catheter-directed thrombolysis significantly reduced the right-to-left ventricular diameter ratio by 0.29 (24%) in patients with intermediate-high and high-risk pulmonary embolism.
Why the study?
Ultrasound-assisted catheter-directed thrombolysis is a treatment option for intermediate-high- or high-risk pulmonary embolism, but real-world use and clinical outcomes warranted further description.
Does ultrasound-assisted catheter-directed thrombolysis (USAT) improve right ventricular function (RV/LV ratio) in patients with intermediate-high- or high-risk pulmonary embolism?
Cohort (n=107)
No
Does ultrasound-assisted catheter-directed thrombolysis (USAT) improve right ventricular function (RV/LV ratio) in patients with intermediate-high- or high-risk pulmonary embolism?
In a real-world cohort, ultrasound-assisted catheter-directed thrombolysis (USAT) achieved high technical success and significantly improved the RV/LV ratio in patients with intermediate-high and high-risk pulmonary embolism, though high-risk patients experienced substantial mortality and bleeding.
Should not yet change practice; extends observational data on USAT in intermediate-high/high-risk PE but leaves efficacy on outcomes open.
BACKGROUND: Ultrasound-assisted catheter-directed thrombolysis (USAT) is a treatment option for patients with intermediate-high- or high-risk pulmonary embolism (PE). This study aimed to describe the use of USAT and its clinical outcomes. METHODS: In this single-center retrospective cohort study, all USAT procedures performed between May 2019 and June 2022 were included. Data were collected from electronic health records. The primary outcome was reduction in right vs. left ventricular diameter (RV/LV ratio). Secondary outcomes were in-hospital mortality and bleeding. RESULTS: A total of 107 patients underwent USAT for PE. The median age was 64 (IQR 53-75) years and 59% were male. Technical success of USAT was achieved in 105 (98%) cases. In 32 cases data on RV/LV ratio changes were available. RV/LV ratio decreased by 0.29 ± 0.19 from 1.19 (1.02-1.35) to 0.89 (0.78-1.00). 12 (11%) patients had a fatal outcome. Bleeding complications were observed in 28 (26%) patients, including 14 (13%) major bleedings and 0 (0%) fatal. Both, death and bleeding rates were significantly higher in high-risk patients. CONCLUSION: We observed a high technical success of USAT in patients with intermediate-high- and high-risk pulmonary embolism, along with a significant early reduction of RV/LV ratio following treatment.
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Wessinger et al. (2025) conducted a cohort in Pulmonary embolism (n=107). Ultrasound-assisted catheter-directed thrombolysis (USAT) was evaluated on Reduction in right vs. left ventricular diameter (RV/LV ratio) (MD -0.29, 95% CI -0.3551 to -0.2194, p=<0.001). Ultrasound-assisted catheter-directed thrombolysis significantly reduced the right-to-left ventricular diameter ratio by 0.29 (24%) in patients with intermediate-high and high-risk pulmonary embolism.
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