# atrial

/ˈætɹɪəl/ (UK) · CEFR C1 · Adjective

Source: https://englishreference.com/word/atrial
Updated: 2026-05-18

## Definition

relating to the atrium, which is the upper part of the heart. You use this to describe things that happen in or affect this specific area.

For teachers: relating to the atrium, the upper chamber of the heart. Typically used in medical or anatomical contexts to describe structures or conditions within this specific cardiac region.

## Examples

- The doctor checked the atrial rhythm during the exam.
- Atrial fibrillation is a common heart condition where the upper chambers of the heart beat irregularly.
- The surgical team performed a procedure to repair the atrial septum, which had developed a small hole that allowed blood to flow between the two upper chambers.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.