# Pulling data with time step of 1 hour

**URL:** https://discourse.kitware.com/t/pulling-data-with-time-step-of-1-hour/1529
**Category:** Pulse Physiology Engine
**Created:** [July 18, 2025, 7:19am UTC](https://discourse.kitware.com/t/pulling-data-with-time-step-of-1-hour/1529 "2025-07-18T07:19:38Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![rachel.clipp](https://discourse.kitware.com/user_avatar/discourse.kitware.com/rachel.clipp/32/195_2.png) [@rachel.clipp](https://discourse.kitware.com/u/rachel.clipp)
#### Post date: [July 18, 2025, 12:56pm UTC](https://discourse.kitware.com/t/pulling-data-with-time-step-of-1-hour/1529/2 "2025-07-18T12:56:35Z")

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Hello,

You can change the frequency that you extract data from the simulation, but the Pulse simulations require a timestep that aligns with the nyquist frequency of the cardiovascular cycle. We have done some early testing of using a larger timestamp and we were able to double the timestep to 0.04 s and still achieve valid results. But currently the models cannot simulate a full hour at a time in a single timestep.

Here is a thread you may find helpful.

[https://discourse.kitware.com/t/changing-step-size/1068/7](https://discourse.kitware.com/t/changing-step-size/1068/7)

Thanks,  
Rachel

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