Ultrasound-Facilitated, Catheter-Directed Fibrinolysis for Acute Pulmonary Embolism.

Summary

Among 544 patients with intermediate-risk acute PE, ultrasound-facilitated catheter-directed fibrinolysis plus anticoagulation reduced 7-day PE-related clinical deterioration compared with anticoagulation alone, without an increase in intracranial hemorrhage; major bleeding rates were numerically higher but not statistically different.

Key Findings

• Primary 7-day composite outcome was reduced from 10.3% to 4.0% (RR 0.39) with catheter-directed lysis.
• Reduction driven by less cardiopulmonary decompensation/collapse; no intracranial hemorrhage observed.
• Major bleeding was numerically higher but not significantly different at 7 and 30 days.

Clinical Implications

In centers with expertise, ultrasound-assisted catheter-directed lysis may be considered for intermediate-risk PE patients with signs of cardiopulmonary compromise, balancing early benefit against bleeding risk and patient comorbidities.

Limitations

• Primary endpoint focused on short-term (7-day) events; long-term mortality and functional outcomes not assessed
• Generalizability may depend on center experience and device availability

Future Directions

Evaluate long-term outcomes, quality of life, right ventricular recovery, and cost-effectiveness; identify subgroups with greatest net benefit and refine dosing/technique.