MONTREAL – Catheter-directed thrombolysis surpassed systemic thrombolysis for minimizing in-hospital mortality of patients with an acute pulmonary embolism in a review of more than 1,500 U.S. patients.
The review also found evidence that U.S. pulmonary embolism (PE) patients increasingly undergo catheter-directed thrombolysis, with usage jumping by more than 50% from 2010 to 2012, although in 2012 U.S. clinicians performed catheter-directed thrombolysis on 160 patients with an acute pulmonary embolism (PE) who were included in a national U.S. registry of hospitalized patients, Dr. Amina Saqib said at the annual meeting of the American College of Chest Physicians.
©Mitchel L. Zoler/Frontline Medical News
Dr. Amina Saqib
Catheter-directed thrombolysis resulted in a 9% in-hospital mortality rate and a 10% combined rate of in-hospital mortality plus intracerebral hemorrhages, rates significantly below those tallied in propensity score–matched patients who underwent systemic thrombolysis of their acute PE. The matched group with systemic thrombolysis had a 17% in-hospital mortality rate and a 17% combined mortality plus intracerebral hemorrhage rate, said Dr. Saqib, a researcher at Staten Island (N.Y.) University Hospital.
“To the best of our knowledge, this is the first, large, nationwide, observational study that compared safety and efficacy outcomes between systemic thrombolysis and catheter-directed thrombolysis in acute PE,” Dr. Saqib said.
The U.S. data, collected during 2010-2012, also showed that, after adjustment for clinical and demographic variables, each acute PE treatment by catheter-directed thrombolysis cost an average $9,428 above the cost for systemic thrombolysis, she said.
“We need to more systematically identify the patients with an acute PE who could benefit from catheter-directed thrombolysis, especially patients with a massive PE,” commented Dr. Muthiah P. Muthiah, a critical-care medicine physician at the University of Tennessee Health Science Center in Memphis. “This may be something to offer to patients who have an absolute contraindication for systemic thrombolysis, such as recent surgery, but it is not available everywhere,” Dr. Muthiah said in an interview.
Dr. Muthiah P. Muthiah
Dr. Saqib and her associates used data collected by the Federal National Inpatient Sample. Among U.S. patients hospitalized during 2010-2012 and entered into this database, they identified 1,169 adult acute PE patients who underwent systemic thrombolysis and 352 patients who received catheter-directed thrombolysis. The patients averaged about 58 years old and just under half were men.
The propensity score–adjusted analysis also showed no statistically significant difference between the two treatment approaches for the incidence of intracerebral hemorrhage, any hemorrhages requiring a transfusion, new-onset acute renal failure, or hospital length of stay. Among the patients treated by catheter-directed thrombolysis, all the intracerebral hemorrhages occurred during 2010; during 2011 and 2012 none of the patients treated this way had an intracerebral hemorrhage, Dr. Saqib noted.
Although the findings were consistent with results from prior analyses, the propensity-score adjustment used in the current study cannot fully account for all unmeasured confounding factors. The best way to compare catheter-directed thrombolysis and systemic thrombolysis for treating acute PE would be in a prospective, randomized study, Dr. Saqib said.
Dr. Saqib and Dr. Muthiah had no disclosures.
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