ECG of the Week 15 June 2022 – Answer

A 52 year old male presents to ED with shortness of breath for the last 2 weeks. The patient had been on a 6 hour flight 2 weeks ago.

Describe and Interpret the ECG


Rate: 102 beats/min

Rhythm: Sinus tachycardia

Axis: Normal axis


PR: 160ms

QRS: 90ms

QTc: 430ms


TWI inversion V2

Flattened T waves III and aVF

S wave I

The above ECG shows a sinus tachycardia with some T wave changes in the inferior and anterior leads. In the clinical context of a recent flight and SOB, a PE needs to be excluded

Changes on ECG due to pulmonary emboli include

  • Normal ECG (18%)
  • Sinus tachycardia (44%)
  • Anterior T wave inveriosn (34%)
  • RBBB (18%)
  • S1Q3T3 (20%)
  • P Pulmonale (9%)
  • Right Axis Deviation (16%)
  • Atrial Fib/Flutter (8%)

This patient had extensive PE’s involving the lobar pulmonary arteries with a troponin rise of >1000 and right heart strain on CT and echo.

There are numerous findings on ECG in patients with PE’s. The ECG can neither diagnose or exclude the diagnosis of PE


Chan TC, Brady WJ, Harrigan RA, Ornato JP, Rosen P. ECG in Emergency Medicine and Acute Care. Elsevier Mosby 2005.