This is the ff-up ECG. This is not SR. The 🔑 to rhythm dx is in the PRI (long lead). You need a caliper to 👀 the PR difference. If you have 🦅👀 the extra P can be 👀. So, the ECG case can be explained with 1 reason.
Tnx for all the replies. This is indeed so tricky. The atrial rate seemed slow to allow 1:1 conduction. Addt HR trend & ECG to highlight the slower rate.
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