Hidden P waves

P waves can be hidden if they occur during the T wave. This can occur when the rate is fast (e.g. Sinus Tachycardia) or with conduction blocks. Lewis leads can help to uncover the P waves.

See also: P wave

Can you add to the information on this page?

This ECG Archive is an academic, non-commercial #FOAMed project aiming to crowdsource a free open access database of ECGs and signs. If you include your personal details such as your name you will be attributed for your contribution, unless you tell us that you don't want this to happen. Personal contact details such as email addresses will not be published but may be used to email you in reply. Full project details and participant information available here.

References

2 ECGs found. Sort by:
TitleDate
ASCDESC
Show:
31030
per page.
Columns: per page.
In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea Bradycardia Irregular Normal Axis Absent P waves Hidden P waves Narrow QRS Short PR Change in rhythm Junctional escape Multiple rhythms Sinus arrhythmia Sinus bradycardia 12-Lead Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
What is the Rhythm?

This ECG is from a young man who presented shortly after a 45 min episode of palpitations, shortness of breath, chest pressure and presyncope. He was an athlete.

This ECG shows marked sinus bradycardia with AV dissociation by default (not AV block) with junctional escape beats.

In the ECGquest archives, this ECG has been tagged with: - Fatigue Hypotension Weakness Regular Tachycardia Hidden P waves Narrow QRS Sinus tachycardia 12-Lead Serial 12-lead Dr Smith's ECG Blog CC BY-NC
Atrial fibrillation with RVR: use POCUS to assess volume; then sinus vs. SVT: use of Lewis leads. Repeat after IVF