Towards a natural pacemaker

Artificial heart pacemakers have saved and extended the lives of thousands of people, but they have their shortcomings - such as a fixed pulse rate and a limited life. Could a permanent biological solution be possible? Richard Robinson and colleagues at New York's Columbia and Stony Brook Universities certainly think so, and their work published in the latest issue of The Journal of Physiology brings the dream a step closer to reality - Physorg.com