Atrial: Pertaining to the atria, the upper chambers of the heart, as in atrial fibrillation and atrial septal defect.
Library > Miscellaneous > Britannica Concise Encyclopedia Irregular rhythm (arrhythmia) of contraction of the atria (upper heart chambers). The most common major ...
Atrial fibrillation â€” Comprehensive overview covers symptoms, causes and treatment of this common heart disorder.
What Are the Symptoms of Atrial Fibrillation? Many patients with atrial fibrillation have no symptoms and are unaware of the abnormal heart rhythm.
atrial /atriÂ·al/ (aÂ´tre-al) pertaining to an atrium. aÂ·triÂ·al (tr-l) adj. Of or relating to an atrium. Atrial. Having to do with the upper chambers of the heart.
What are the symptoms of atrial fibrillation? Many patients with atrial fibrillation have no symptoms and are unaware of the abnormal heart rhythm.