Patent 8428705 was granted and assigned to ReactDx on April, 2013 by the United States Patent and Trademark Office.
Atrial fibrillation is detected in an electrical signal representative of a beating heart by measuring atrial activity over a time window of three or more beats, measuring beat interval variation over the time window and combining the measures of atrial activity and beat interval variation to produce an indication of an atrial fibrillation condition in the electrical signal.