What is the correlation between the iPhone Heart History and a clinical heart monitor

aleta240 wrote:

When I was diagnosed with Afib they put me on a 24/7 heart monitor to track my Afib for 30 days. (Literally, pasted to my chest) How does the iPhone Afib periodic checking compare in reliability to a complete 24/7 exclusive diagnostic heart monitor?

You answered your own question. The afib feature of the Apple Watch only checks periodically, your Holter monitor is a continuous recording. Beyond that, the watch is a “one lead” ECG; the monitor you wear is probably at least 5 leads, so it provides much more information by monitoring more than the atrial signal; it records electrical signals from other parts of the heart.

The Watch has been approved by the US FDA and many foreign health agencies for detection of atrial fibrillation. It has not been approved (or claimed by Apple) for detection of any other cardiac defects. The wearable monitors can detect many other ECG abnormalities, that frequently appear concurrently with afib.

Ask your doctor.

Heart history just displays data from whatever heart monitor you have that you have authorized to update your health data. Either that or I don’t understand your question.