Original MICA image-reading exercise, unscored. No clinical narrative absent from the source is added.
- Describe visible findings before proposing an interpretation.
- Suggest an interpretation and at least one image limitation.
- Which clinical findings or investigations would complement this observation?
Reveal the explained reading
Atrial fibrillation · ECG
- Rhythm
- Irregularly irregular
- Atrial activity
- No discrete P waves
- Rate
- Measure ventricular response
- Reading
- Tracing and clinical context
Morphological description
Describe absent repeating P waves, possible fibrillatory activity and ventricular rate.
Causes and diagnostic direction
Associated conditions include hypertension, cardiac or valve disease, thyroid disorders, alcohol exposure and acute illness.
Differential diagnoses
Variable-conduction flutter, ectopy and multifocal atrial tachycardia may be irregular; seek organised atrial activity.
Pitfalls and limitations
Artefact may mimic fibrillation; an irregular pulse or automatic alert cannot replace ECG confirmation.
Take-home message
Recognise irregularity and absent organised atrial activity, then confirm the reading and assess the patient.
Sources
- Atrial Fibrillation - StatPearls - NCBI Bookshelf ↗
- EKG Rhythm - StatPearls - NCBI Bookshelf ↗
- 2024 ESC Guidelines for the management of atrial fibrillation developed in collaboration with the European Association for Cardio-Thoracic Surgery (EACTS) | European Heart Journal | Oxford Academic ↗
Documentary review: 2026-10-15
Media source & rights
- Author
- CardioNetworks
- Original source
- CardioNetworks · Fibrillation atriale — tracé ECG · https://commons.wikimedia.org/wiki/File:Afib_ecg_(CardioNetworks_ECGpedia).jpg · CC BY-SA 3.0
- Licence
- CC BY-SA 3.0
- Changes
- Full original field and annotations retained; WebP conversion, EXIF/GPS metadata removed, proportional derivatives without upscaling, cropping or medical retouching. Derivatives shared under the same CC BY-SA 3.0 licence.
- Dimensions
- 2000 × 987 px
- Check
- 2026-10-15