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Improved cardiac output for Impella 2.5 trial patients
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Abiomed
: 25 September, 2009 (New Product) |
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Abiomed has reported on the results of clinical trials involving the Impella 2.5 arm of the MACH II trial |
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Abiomed has announced new clinical data from Academic Medical Centre’s (AMC) three-year follow-up results from patients in the Impella 2.5 arm of the MACH II trial, revealing improved left ventricular function, cardiac output and quality of life.
The MACH II trial, evaluating safety and feasibility in STEMI, included 20 patients; ten patients were treated with three days of Impella 2.5 support; ten control patients were treated with routine standard of care. The initial four-month results, which demonstrated significant recovery of left ventricular function in Impella 2.5 patients, were published in the Journal of American College of Cardiology in 2008.
The three-year follow-up results from MACH II were presented by Jose PS Henriques, MD, PhD, Academic Medical Centre, University of Amsterdam, at the Abiomed customer evening symposium at TCT 2009. The results measured the three-year follow-up of 20 large anterior STEMI patients in the MACH II trial and demonstrated significant overall improvements in cardiac function as well as quality of life in the ten patients that received Impella 2.5 within the trial.
All patients were measured in an IRB-approved protocol that calculated echo results, exercise testing and quality of life, and showed the following results from core laboratory analysis and strict processes:
Left ventricular ejection fraction in Impella 2.5 patients increased from 28% at the baseline, to 41% in the four-month analysis, to 51% at the three-year follow-up period. Left ventricular ejection fraction in the control patients increased from 40% at the baseline, to 45% after the four-month analysis to 47% at the three year analysis. Impella 2.5 patients continued to show improvement in left ventricular ejection fraction, demonstrating a net increase of 23 ejection fraction points while control patients only showed a net increase of 7 ejection fraction points.
Significant benefit in exercise capacity was demonstrated stronger by Impella 2.5 patients, than control patients, which also improves the quality of life for the patient
Impella 2.5 patients saw no effects on aortic valve at three-year follow-up
“The initial MACH II results demonstrated that Impella had sustained benefits at four months and the three-year analysis, showing a 10% increase in ejection fraction, is an even stronger indicator that this device will make a significant difference in AMI treatment,” said Henriques. “Additionally, these findings could suggest that Impella 2.5 patients who have been discharged have higher rates of recovery and lower chances of hospital re-admittance.”
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