I'm a platelet donor. I was deferred from donating last August 13 due to having an irregular heartbeat detected. Saw PCP and cardiologist, diagnosed with intermittent atrial fibrillation. Put on beta blocker and blood thinner. October visit to cardiologist showed no signs of atrial fibrillation. Cardiologist gave permission to go off blood thinner for two days once a month to resume platelet donations. Stopped talking Eliquist after Friday night dose. Had scheduled platelet donation this morning. Received two overnight irregular rhythm notification. Did three ECG, showed atrial fibrillation. Nurse at blood donor center detected no irregular heartbeat, successfully donated two units platelets and three units plasma. Back on Eliquist, will notify cardiologist. Not really concerned. Scheduling next platelet donation same day as dental appointment seeing I have to be off on blood thinners for dental exam. My blood pressure monitor did not detect irregular heartbeat this morning. Makes one wonder which instrument is accurate.