What composes the human heart? Researchers crunch the numbers

A foundational study published in the journal PNAS (Proceedings of the National Academy of Sciences) this week by researchers at the University of Toronto's Institute of Biomaterials & Biomedical Engineering (IBBME) and the McEwen Centre for Regenerative Medicine have identified the optimal structure and cell ratio associated with heart function – and the discovery has already led the team to another research first: the engineering of the first-ever living, three-dimensional human arrhythmic tissue.

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