Great case, very informative. Different kind of case but similar findings on ultrasound. I had a dialysis patient who presented with 3rd degree heart block. Somewhat widened QRS on EKG. US showed a very poorly contracting heart & left ventricle. I was suspicious for hyperkalemia. Gave Calcium and you could see the improvement on ultrasound almost immediately after giving it along with a narrowing of the QRS and his heart rate went up to 60 from 20 and the block went away. It was cool to see the changes in hemodynamics, ultrasound and EKG with treatment. 40 minutes later call from the lab with critical K+ of 7.4.