Safety and Outcome of Rheolytic Thrombectomy for the Treatment of Acute Massive Pulmonary Embolism.

BACKGROUND

Percutaneous rheolytic thrombectomy is an attractive alternative to thrombolytic therapy in patients with acute pulmonary embolism (PE), but its use is currently discouraged due to safety concerns.

METHODS

We studied 33 consecutive patients (age, 43 ± 13 years; 20 men and 13 women) with acute PE and contraindications to thrombolytic therapy who had rheolytic thrombectomy with the AngioJet catheter (Boston Scientific). Acute massive PE was initially diagnosed by computed tomography and then confirmed by pulmonary angiography. Pulmonary thrombus location was evaluated prior to the procedure. Anemia was defined as a decrease in hematocrit level <39% for men and <36% for women. Renal failure was defined as oliguria (urine output <500 mL/24 hours) or an increase in creatinine (>25% over baseline or an overall increase by 1 g/dL).

RESULTS

Catheter thrombectomy resulted in angiographic improvement in 32 patients (96%), with a rapid amelioration in functional class (from 3.3 ± 0.9 to 2.1 ± 0.7; P<.001) and an increase in oxygen saturation (from 71 ± 15% to 92 ± 17%; P<.001). No patient died. Side effects included transient heart block (n = 1), hypotension (n = 3), and bradycardia (n = 5). Anemia occurred in 4 patients, while renal failure was not detected. Clinical improvement was maintained during follow-up. At 1 year, systolic pulmonary pressure was significantly lower than at baseline (65 ± 31 mm Hg vs 31 ± 19 mm Hg; P<.001).

CONCLUSIONS

Catheter thrombectomy with AngioJet in patients with acute massive PE and contraindications to thrombolysis is an effective therapeutic alternative that is not associated with relevant and persistent side effects, including the risk of death or developing anemia and renal failure.