# arrhythmia

/ɝˈɪðmiə/ (US) · /ɐrhˈɪθmiə/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/arrhythmia
Updated: 2026-05-30

## Definition

an irregular or abnormal heartbeat. It can make your heart beat too fast, too slow, or in a strange pattern.

For teachers: an abnormal heart rhythm, typically caused by a malfunction in the heart's electrical conduction system. Often used in medical contexts to describe conditions like tachycardia or bradycardia.

## Examples

- The doctor checked his heart for any signs of arrhythmia.
- Patients with a history of arrhythmia often require a pacemaker to maintain a steady heartbeat during physical activity.
- While some forms of arrhythmia are harmless and occur during periods of intense stress, others can lead to serious complications such as stroke or heart failure if left untreated.

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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.