You could use something like this… AliveCor® KardiaMobile EKG Monitor | FDA-Cleared | Wireless Personal EKG | Works with Smartphone | Detects AFib Bradycardia and Tachycardia in 30 Seconds https://www.amazon.com/dp/B01A4W8AUK
Which I bought for my parents when they both started having arrhythmias, prior to the Apple Watch. I found it worked best slapping it on their chest wall. Can get a decent rhythm strip.
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I have had it from before FDA approval (got it in another country). I use it daily on patients when I’m running around and our cardiac EP team use it as well. Love my AliveCor.
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