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Heart Rhythm Conditions | Last Active: 1 day ago | Replies (9)
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@marybird Yes, but it doesn't rule out atrial fibrillation. You can have AF with an HR of less than 90!!! What that lower rate means is that 'RVR', or 'rapid ventricular response' is not currently appearing. When a patient learns they have AF, and that their peak rates are 130-140, it means '... AF with RVR,' which should appear on the written formal diagnosis.
Of course, we would know for certain that it IS AF because of the usual indicators: no P-wave and the R-to-R intervals are all over the place.
Replies to "@marybird Yes, but it doesn't rule out atrial fibrillation. You can have AF with an HR..."
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@gloaming I'm very much aware that A-fib can occur with heart rates within the normal range, it's happened to me on occasion. I also understand the physiological role of the AV node in conduction of signals from the atrium to the ventricles in the initiation of a heart beat, as it were, as well as the ratios of the number of signals passed to the AV node by the fibrillating/fluttering atrium to the number that actually get to the ventricles. It's that ratio of signals that get to the ventricles that determine if a person's A-fib is accompanied by RVR, and determines the observed heart rate.
The OP mentioned being dehydrated and having a "racing heart rate" of 87-90 which would seem a little fast if a person's resting heart rate was normally say, in the low 60's, but the racing description is more of a perceived impression, seems to me. There was no mention of A-fib in the post, although I suppose it could be implied from the mention that the OP is now taking Eliquis.