Long-term experience with transvenous catheter pulmonary embolectomy

Area of Science:

• Cardiology
• Interventional Radiology
• Pulmonary Medicine

Background:

• Massive pulmonary embolism (PE) carries a high mortality rate, often necessitating aggressive interventions.
• Traditional treatments like lytic therapy or open embolectomy have significant risks and limitations.
• Transvenous catheter pulmonary embolectomy presents a less invasive alternative.

Purpose of the Study:

• To evaluate the efficacy and outcomes of transvenous catheter pulmonary embolectomy for massive PE.
• To assess the procedure's impact on hemodynamic parameters and patient survival.
• To compare the success rates across different categories of PE.

Main Methods:

• A series of 46 patients with massive PE underwent transvenous catheter pulmonary embolectomy under local anesthesia.
• Initial patients (n=10) were treated with a basic catheter, while subsequent patients (n=36) received an improved system with a vena caval filter and directional control.
• Indications included hypotension despite inotropic support or respirator dependence.

Main Results:

• Overall, 76% of patients had emboli extracted, with a 30-day survival rate of 70%.
• Significant hemodynamic improvements were observed, including reduced pulmonary artery pressure and increased cardiac output (p=0.003).
• Complications were generally manageable, with wound hematoma and pulmonary infarct being the most common.

Conclusions:

• Catheter pulmonary embolectomy is highly effective for massive and major PE, with success rates of 82% and 100%, respectively.
• The procedure is less successful in chronic PE (56% success rate).
• Successful embolectomy is a strong predictor of long-term survival, averaging 89 months.