Spatial Velocity - What Does It Mean?

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Spatial velocity refers to the rate of change of a wave, specifically in the context of ECG, indicating how the P wave voltage changes over time. It is suggested that spatial velocity may relate to group velocity, but they are not necessarily the same. One explanation provided defines spatial velocity as a vector calculated from the difference in ECG values at different time points, normalized by the time interval between samples. This concept is crucial for analyzing the dynamics of ECG signals. Understanding spatial velocity can enhance the interpretation of ECG waveforms in clinical settings.
al_fragile
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Hello..
I'm having some trouble understanding the meaning of the trem "spatial velocity". I'm working on ECG and i need to understand what "spatial velocity" means. I have already read things about velocity and I'm thinking if spatial velocity is the same as "group velocity". Does anybody know if these terms refer to the same thing ?

Thnk u..
 
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Hi Al,

I have the same doubt. I found this article ("http://www.iss.it/publ/anna/2003/2/392195.pdf") that specifies "P spatial velocity" as "the rate of change of the P wave voltage with respect to time". Because of that I believe the spatial velocity is the rate of change of the ECG wave with respect to time. If you have a wave being sampling (with samples 1, 2, 3, 4,... i-1, i, i+1, ..., n), with delta_time between the samples, the spatial velocity vector would be SV(i)=(ECG(i+1)-ECG(i-1))/(2*delta_time).
I am not sure, but I believe it is something like that. If you already discovered please let me know.

Regards,
Tito
 

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