Ultrasound-Assisted Catheter-Directed Thrombolysis for Submassive Pulmonary Embolism

Area of Science:

• Cardiology
• Interventional Radiology
• Pulmonary Medicine

Background:

• Pulmonary embolism (PE) poses significant mortality and morbidity risks, often linked to right heart strain.
• Systemic thrombolysis is effective but carries a high bleeding risk.
• Catheter-directed thrombolysis (CDT) offers a promising alternative for PE treatment.

Purpose of the Study:

• To evaluate the efficacy and safety of ultrasound-assisted catheter-directed thrombolysis (CDT) for pulmonary embolism.
• To assess the impact of CDT on right heart strain indicators and pulmonary vascular obstruction.
• To determine the incidence of bleeding events and 30-day mortality associated with CDT.

Main Methods:

• Retrospective cohort study of 30 patients undergoing ultrasound-assisted CDT for PE.
• Review of patient records for bleeding risk factors, including recent major surgery.
• Measurement of right heart strain (echocardiogram, CT) and pulmonary vascular obstruction before and after CDT.

Main Results:

• Significant reduction in right ventricular systolic pressure and pulmonary vascular obstruction post-CDT.
• Improved indicators of right heart function, with decreased dilation and hypokinesis.
• No major or moderate bleeding events attributed to CDT, even in patients with contraindications.

Conclusions:

• Ultrasound-assisted CDT is effective in rapidly alleviating right heart strain in PE patients.
• CDT presents a safe alternative to systemic thrombolysis, particularly for patients with bleeding risk factors.
• Further research is warranted to explore CDT in patients with contraindications to systemic thrombolysis.