Pr interval

Specialties CCU

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If pr intervals vary say one is 0.23 then the next is 0.21, then .20 and so forth but everything else measures normal and no dropped qrs what rhythm would this be?

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Specializes in RETIRED Cath Lab/Cardiology/Radiology.

If the morphology of the P wave is the same, I would think this is a normal variant of the conduction system (which, as it is not a machine, will not be precisely the same 100% of the time)

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What does "and so forth..." mean?

With no other information available, the most likely scenario is a first degree AV block, with a very slight PR interval variation as a kind of normal variant.

But I'd much rather see the rhythm, and preferably several leads and a long strip, before saying that with any confidence. A wandering atrial pacemaker would be one alternative possibility, as would multifocal atrial tachycardia, or AV dissociation wherein both the atrial and ventricular pacemakers are firing at very similar rates.

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4 hours ago, love lilacs said:

If pr intervals vary say one is 0.23 then the next is 0.21, then .20 and so forth but everything else measures normal and no dropped qrs what rhythm would this be?

....ignored.

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Specializes in anesthesiology.
On 3/21/2019 at 10:08 AM, dianah said:

If the morphology of the P wave is the same, I would think this is a normal variant of the conduction system (which, as it is not a machine, will not be precisely the same 100% of the time)

second this

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