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An investigational material known Bioabsorbable Cardiac Matrix (BCM) that is injected through the coronary artery to prevent cardiac remodelling in heart attack patients had no significant effect compared to a saline placebo, according to results of the PRESERVATION I trial.
EMBARGO: 01 SEPTEMBER 2015 at 09:00 BST
LONDON, UK – 01 September, 2015: An investigational material known Bioabsorbable Cardiac Matrix (BCM) that is injected through the coronary artery to prevent cardiac remodelling in heart attack patients had no significant effect compared to a saline placebo, according to results of the PRESERVATION I trial.
The Hot Line findings announced today at ESC Congress 2015 were “somewhat surprising and disappointing”, said study investigator Uwe Zeymer, MD, from Institut für Herzinfarktforschung, in Ludwigshafen, Germany.
“Based on encouraging results in experimental studies and a previous pilot trial in humans, which showed a preservation of left ventricular dimensions after heart attack, we had expected to find a reduction in left ventricular enlargement and an improvement in clinical symptoms compared to saline control,” said Professor Zeymer.
BCM is a liquid mixture of sodium alginate and calcium gluconate that can be injected into the coronary artery during percutaneous coronary intervention (PCI) in heart attack patients.
The liquid flows into the heart, where it reacts with ionized calcium that collects in damaged heart muscle, forming an absorbable gel. This gel acts as flexible scaffold, or “matrix”, that supports the heart during repair and then dissolves, explained Professor Zeymer.
Previous studies have shown that injection of BCM prevents remodelling of the heart - which is changes to the shape, size and structure of cardiac muscle that occur after a heart attack, and the deployment procedure has been shown to be safe without any difference in ischemic or arrhythmic events compared to placebo, he noted.
The study included 303 subjects (from Australia, Belgium, Canada, France, Germany, Israel, Poland, Spain, and USA) who were randomised to receive an intracoronary injection of the investigational substance or a saline control.
For the primary endpoint, change from baseline in left ventricular end diastolic volume index (LVEDVI) - an echocardiographic measurement of remodelling assessed at 6 months – there was no significant difference between the two groups.
In addition, the groups showed no significant difference in any secondary endpoints including Kansas City Cardiomyopathy Questionnaire (KCCQ), Six minute walk test (6MWT), NYHA functional classification, time to cardiovascular death or non-fatal heart failure events or cardiovascular hospitalisations, or time to first rehospitalisation due to any CV event.
The dropout rate was similar between those treated with the investigational substance and placebo (4% versus 6%) and there were no significant differences in serious adverse events between groups.
Professor Zeymer said there are several possible explanations for why the study did not show better outcomes with the investigational material. “Potential reasons include selection of a patients with too large an infarct without any chance to prevent remodelling, or timing of the intervention- which might have been done too late. Therefore further studies are necessary to determine the optimal timing and target population for this innovative therapy.”
SOURCES OF FUNDING: The study was funded by Bellerophon Therapeutics, Inc.
DISCLOSURES: Professor Zeymer has received honoraria for serving as member of the executive committee of PRESERVATION I.
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About the European Society of CardiologyThe European Society of Cardiology (ESC) represents more than 90 000 cardiology professionals across Europe and worldwide. Its mission is to reduce the burden of cardiovascular disease in Europe. About ESC Congress 2015ESC Congress is the world’s largest and most influential cardiovascular event contributing to global awareness of the latest clinical trials and breakthrough discoveries. ESC Congress 2015 takes place 29 August to 2 September at ExCel London in London, UK. Access the scientific programme. More information is available from the ESC Press Office at firstname.lastname@example.org.To access all the scientific resources from the sessions during the congress, visit ESC Congress 365. This press release accompanies both a presentation and an ESC press conference at the ESC Congress 2015. Edited by the ESC from material supplied by the investigators themselves, this press release does not necessarily reflect the opinion of the European Society of Cardiology. The content of the press release has been approved by the presenter.
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