A system for and method of treating a malfunctioning heart is based on hemodynamics, the O.sub.2 in blood at a site in a patient's circulatory system being sensed. A signal is developed representative of short term O.sub.2 level in the blood at the sites preferably at a site (right ventricle or a pulmonary...http://www.google.com/patents/US4967748?utm_source=gb-gplus-sharePatent US4967748 - O.sub.2 level responsive system for and method of treating a malfunctioning heart
