EKOS Corporation, a BTG International group company (BTG plc (LSE: BTG)), notes the presentation of the results of the SEATTLE II trial this afternoon at ACC.14, the 63rd Annual Scientific Session and Exposition of the American College of Cardiology in Washington, DC in the United States. The results were presented by Dr. Gregory Piazza, MD, Staff Physician, Cardiovascular Division, Brigham and Women’s Hospital and Instructor of Medicine, Harvard Medical School.
The SEATTLE II study is a prospective, single-arm, multi-center trial to evaluate the safety and efficacy of ultrasound-facilitated catheter-directed low-dose thrombolysis, using the EKOS EkoSonic® Endovascular System, for treating 150 patients with acute massive
Massive PE has a mortality rate of about 52% at 90 days. In the SEATTLE II study, there were 31 patients presenting with massive PE manifested by syncope and hypotension. However, no patients with massive PE died within the 30 day follow up period. Of 150 patients in the overall study, only one death was directly attributed to PE.
There were no intracranial hemorrhages and no fatal bleeding events. Major bleeds occurred in 17 patients and was comprised of one severe bleed and 16 moderate bleeds. Six of the major bleeds occurred in patients with co-morbidities known to be associated with an increased risk of bleeding during thrombolytic therapy.
The abstract concluded that ultrasound-facilitated catheter-directed low-dose fibrinolysis for acute PE minimizes the risk of intracranial hemorrhage, improves RV function, and decreases pulmonary hypertension.
Samuel Z. Goldhaber, MD, Professor of Medicine, Harvard Medical School and Director, Thrombosis Research Group, Brigham and Woman’s Hospital (Boston, MA), and Principal Investigator for SEATTLE II said, “This trial represents a breakthrough in demonstrating the safety and efficacy of thrombolytic therapy for acute PE. The reduction of the RV/LV ratio by 0.42 is substantial and clinically significant, without any intracranial hemorrhage and using a much reduced lytic dose. These findings establish a new rationale for considering thrombolysis in both massive and submassive PE.â€