Dr. David Mazer, St. Michael's Hospital (IMAGE) St. Michael's Hospital Caption Research led by Dr. David Mazer, associate scientist in the Keenan Research Centre for Biomedical Science of St. Michael's Hospital in Toronto, has found that lower thresholds for blood transfusions for cardiac surgery patients compared to traditional thresholds provide positive patient outcomes and safety at six months after surgery. Credit St. Michael's Hospital Usage Restrictions Please credit St. Michael's Hospital License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.