Cabrera's sign

Cabrera’s sign is a notched QRS greater than 50 ms on the ascending limb of the S-wave in V3, V4 or V5 in the presence of a LBBB. It suggests acute myocardial infarction.

See also: Other waves

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 Personal contact details such as email addresses will not be published but may be used to email you in reply.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.

Featured Example


ECG Library (2)

Sort by:
In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea 12-Lead Serial 12-lead Cabrera's sign Concordant ST depression in V1-V3 Excessive discordant ST depression. Fragmented QRS Normal Axis Wide QRS LBBB Dr Smith's ECG Blog CC BY-NC
CHF Exacerbation with Old LBBB: Is There New Infarction or Not?

This ECG is from a very elderly woman who presented with shortness of breath, chest and back pain intermittently for several nights. It was relieved by isosorbide, but when she lost this medication she became worse. She had a background of CAD, ischemic cardiomyopathy and heart failure with an ICD in situ for primary prevention. On arrival she was hypoxic (SpO2 88%) with a good BP and HR 90, but improved on CPAP then BIPAP. This was her initial ECG.

In the ECGquest archives, this ECG has been tagged with: - 12-Lead Cabrera's sign Excessive discordant ST elevation Sinus tachycardia LBBB Acute Anterior MI Dr Smith's ECG Blog CC BY-NC
Left Bundle Branch Block and Left Anterior Descending Artery occlusion: Serial ECGs then T-wave inversion after reperfusion

This ECG is from a man in his 50s who presented with chest pain.

This ECG shows sinus tachycardia and LBBB with excessive discordant ST elevation in V3 and notching (Cabrera's sign). The cause was a 100% LAD occlusion.