The ECG shown on page 15 (ECG 15.3) is from a 47 year-old female with breast cancer who presented with shortness of breath.
a) Describe the abnormalities. (20% marks)
b) What is the likely underlying diagnosis? (10% marks)
This ECG was stolen from the LITFL page on ECG changes in massive pericardial effusion. The alternans is most clearly visible in the rhythm strip, which is V1.