Definition of Atrial

Atrial: Pertaining to the atria, the upper chambers of the heart, as in atrial fibrillation and atrial septal defect.

Last Editorial Review: 6/14/2012

Heart Disease Pictures Slideshow: A Visual Guide to Heart Disease

Search MedTerms:

Back to MedTerms online medical dictionary A-Z List
Pill Identifier Tool

Need help identifying pills and medications?
Use the pill finder tool on RxList.