After Peloton producer Jessie Malone went to the emergency room while experiencing an elevated heart rate, she was diagnosed with Atrial fibrillation — and she immediately changed her lifestyle. She joins TODAY along with cardiac electrophysiologist Dr. Marc Miller to share an update on her health. » Subscribe to TODAY: youtube.com/@TODAY About: TODAY brings you the latest headlines and expert tips on money, health and parenting. We wake up every morning to give you and your family all you need to start your day. If it matters to you, it matters to us. We are in the people business. Subscribe to our channel for exclusive TODAY archival footage & our original web series. Connect with TODAY Online! Visit TODAY's Website: today.com Find TODAY on Facebook: facebook.com/today Follow TODAY on Twitter: twitter.com/TODAYshow Follow TODAY on Instagram: instagram.com/todayshow » Stream TODAY All Day: today.com/allday About...