During diastolic coronary perfusion, blood perfuses through the heart via the coronary arteries. Delivery of a therapeutic and/or diagnostic agent to the heart during diastolic coronary perfusion allows the therapeutic and/or diagnostic agent to efficiently perfuse through the heart. A medical device...http://www.google.ca/patents/US7951129?utm_source=gb-gplus-sharePatent US7951129 - Diastolic coronary perfusion detection for timed delivery of therapeutic and/or diagnostic agents