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And here's something for us mitral valve folks:
http://www.technologyreview.com/biomedicine/21582/
http://www.technologyreview.com/biomedicine/21582/
researchers at Harvard University and Children's Hospital Boston are testing a robotic system that could help surgeons perform a common valve repair while the heart beats on. The system uses 3-D ultrasound images to predict and compensate for the motion of the heart so that the surgeon can work on a patient's mitral valve as it moves