Friday, May 22, 2009


Challenge: What's your diagnosis?

Image shown under fair use.


Stephanie said...

holy shit...

um, pulsus alternans?

Dr. Yahya said...

Guten Tag!
In this ECG recording, the QRS voltage is changing from one beat to another. This is called Electrical Alternans of QRS complex and is seen in patients with Pericardial Effusion/Tamponade.

Alex said...

electrical alternans =P

Craig Chen said...

haha yes! Good job! Steph! I have to censor this blog for the 8 year old cardiologists that visit this site.

AC is alternating current; this is electrical alternans, suggestive of pericardial effusion. Electrical alternans is alternating amplitude of QRS complexes in any or all leads.

Sources: UpToDate;