ECG Blog #449 — Isorhythmic AV Dissociation?
Ken Grauer, MD
SEPTEMBER 28, 2024
The ECG in Figure-1 — was obtained from a 45-year old man with diabetes, who was being treated for septic shock. QUESTIONS: How would YOU interpret the ECG in Figure-1 ? What is the rhythm? Why does QRS morphology in the long lead II rhythm strip change every-other-beat? Figure-1: The initial ECG in today's case. MY Thoughts on the ECG in Figure-1: This is a challenging ECG to interpret because of: i ) the changing QRS morphology; and , ii ) the difficulty in seeing all of the P waves.
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