![]() ![]() The QT interval measures the time it takes the lower chambers of the heart to go through a full electrical cycle associated with a heartbeat. The PR interval and QRS complex measure the time it takes electricity to travel from the top to the bottom chamber and across the bottom chambers, ultimately causing the heart to pump blood through the heart. Specifically, the UMSOM researchers reviewed two ECG measures: the PR interval/QRS complex and the QT interval. A 12-lead ECG measures the electrical conduction in 12 different electrical angles of the heart. Monitoring the heart with ECG after transplantation is one way to assess the electrical conduction system after a heart transplant. He and his colleagues used an ECG to monitor the patient daily after his transplant. To be clear, his heart rhythm was normal, it was only the time it takes for electricity to travel through the heart that was prolonged.” “ At times, these signals traveled even more slowly than what we would expect from a human heart. Bennett,” said study leader Timm Dickfeld, MD, PhD, professor of medicine and director of electrophysiology research at UMSOM. “Electrical signals in a pig heart normally travel very quickly, faster than in a human heart, but we found that electrical signals in the transplanted pig heart traveled far more slowly in Mr. The unexpected heart conduction measures, as seen on an electrocardiogram (ECG), did not contribute to the failure of the heart after two months but will help inform future cardiac xenotransplants. The findings were presented at the American Heart Association (AHA) meeting this past weekend. Their latest study demonstrates for the first time that unexpected electrical changes occurred in the pig heart transplanted into the patient David Bennett. Ten months after transplanting the first genetically-modified pig heart into a human patient, University of Maryland School of Medicine (UMSOM) researchers continue to report on new findings from the landmark transplant. UMSOM Researchers Report on New Findings from Heart Monitoring Systems at American Heart Association Meeting
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