The only patient data I have is that this ECG is from a 73-year old man. At the request of the site administrator (Dawn Altman), I'm posting this ECG because there isn't one quite like it in the Guru's archives. Some readers will recognize it as one I recently posted on another website. This one lives up to the title of "Challenging". I'll make the same general statement I did on the other website: You'll need to make careful measurements with calipers on this ECG to come to the correct interpretation.