OR-1896 increases force of contraction in the isolated human atrium.

"Declarations Ethical approvalAnimals: The investigation conformed to the Guide for the Care and Use of Laboratory Animals as published by the National Research Council (2011). The animals were handled and maintained according to the approved protocols of the Animal Welfare Committee of the University of Halle-Wittenberg, Halle, Germany. Humans: This study complies with the Declaration of Helsinki and has been approved by the local ethics committee (hm-bü 04.08.2005). Consent to participateInformed written consent was obtained from all patients included in the study. Consent for publicationAll authors declare that they have seen and approved the submitted version of this manuscript. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

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