STUDIO CITY (CBSLA.com) — One in three Americans have never heard of atrial fibrillation but the Heart Rhythm Society says it’s imperative they do.

Atrial Fibrillation (AF) is a potentially life-threatening disorder that affects heart rhythm. More than two million people in the nation have AF, and about 160,000 new cases are diagnosed each year, the society reports.

Dr. Leslie Saxon, Chief of Cardiovascular Medicine at USC, appeared on KCAL9 Saturday morning to discuss AF’s symptoms.

Saxon also offered tips to patients on what questions to ask their doctors about the disease.

For more information go to http://www.MyAFib.org/.