A member asked:

What do sdnn and rmssd mean on a holter report? and what are the normal values?

A doctor has provided 1 answer

SDNN,RMSSD: These are mathematically derived numbers analyzing the variation in the heart rate trying to predict risk of unexpected sudden death. I've never seen them on a report or seen anyone using them.

Answered 12/21/2014

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What is an SVE on a holter report? Is it normal or dangerous?

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