ECG Case 032

Young adult patient with pleuritic chest pain. Describe the ECG.

TOP 100 ECG QUIZ LITFL 032

Describe and interpret this ECG

ECG ANSWER and INTERPRETATION

Main Abnormalities

This ECG demonstrates many of the classic features of acute pericarditis:

  • Widespread concave ST elevation with PR depression — most notable in I, II, III, aVF, V5-6.
  • PR elevation in the inverted leads aVR and V1.
  • Downward sloping of the TP segment = “Spodick’s sign”.
  • No reciprocal changes of STEMI.
  • ST segment / T wave ratio > 0.25 (favours pericarditis over BER)

ST elevation and PR depression

Pericarditis ST elevation and PR depression

Spodick sign

Spodick sign pericarditis

CLINICAL PEARLS

Pericarditis versus Benign Early Repolarisation

Pericarditis can be difficult to differentiate from BER as both conditions are associated with concave STE. One useful trick to distinguish between these two entities is to look at the ST segment / T wave ratio.

  • The amplitude of the STE (from PR segment to J point) is measured in V6 and compared to the T wave amplitude.
  • A ratio of > 0.25 suggests pericarditis
  • A ratio of < 0.25 suggests BER

Example 1: Benign Early Repolarisation

ST-segment-T-wave-ratio-Benign Early Repolarisation
  • ST segment height = 1 mm
  • T wave height = 6 mm
  • ST / T wave ratio = 0.16
  • The ST / T wave ratio < 0.25 is consistent with BER

Example 2: Pericarditis

ST-segment-T-wave-ratio-pericarditis
  • ST segment height = 2 mm
  • T wave height = 4 mm
  • ST / T wave ratio = 0.5
  • The ST / T wave ratio > 0.25 is consistent with pericarditis.


TOP 100 ECG SERIES


Emergency Physician in Prehospital and Retrieval Medicine in Sydney, Australia. He has a passion for ECG interpretation and medical education | ECG Library |

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.