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IMPRESSION: The finding of sinus bradycardia with 1st-degree AV block + marked sinus arrhythmia + the change in PR interval from beat #5-to-beat #6 — suggests a form of vagotonic block ( See My Comment in the October 9, 2020 post in Dr. Smith's ECG Blog ). Initial high sensitivity troponin I returned at 6ng/L (normal 0.20
A coronaryangiogram was done that did not show significant coronary artery disease. I have periodically called attention to examples of the Ashman phenomenon as they occur in Dr. Smith's ECG Blog ( See My Comments in the January 5, 2020 post — the June 17, 2020 post — and the March 30, 2023 post , among others ).
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