A heart stimulator is disclosed which is capable of sensing and stimulating both the atrium and ventricle in a heart such a way that a ventricular stimulation pulse is emitted either after a stimulated or spontaneous atrial event following the atrioventricular interval, or after the expiration of a minimum...http://www.google.es/patents/US5395397?utm_source=gb-gplus-sharePatente US5395397 - Method and apparatus for stimulating a heart
