Impact of Ventricular Assist Devices on Brain Blood Flow Regulation
Author Information
Author(s): Judith Bellapart, Gregory S Chan, Yu-Chieh Tzeng, Philip Ainslie, Adrian G Barnett, Kimble R Dunster, Rob Boots, John F Fraser
Primary Institution: Royal Brisbane and Women's Hospital
Hypothesis
What is the effect of ventricular assist devices on the relationship between blood pressure and cerebral blood flow?
Conclusion
Pulsatile ventricular assist devices affect the coherence of the cerebral pressure-flow relationship but do not significantly disrupt the gain or phase.
Supporting Evidence
- The study found no significant difference in gain and phase values between the two groups.
- The low frequency coherence was significantly higher in cases compared with controls.
- Two cases with the highest coherence had much higher spectral power in mean arterial blood pressure.
Takeaway
This study looked at how heart devices affect blood flow to the brain. It found that while the devices change how blood pressure and brain blood flow are related, they don't seem to mess up the brain's ability to regulate blood flow.
Methodology
The study compared 5 patients with pulsatile ventricular assist devices to 5 control patients, measuring blood pressure and cerebral blood flow velocity using transcranial Doppler.
Limitations
The small sample size may limit the statistical significance of the findings.
Participant Demographics
Patients included 5 with ventricular assist devices and 5 control patients matched for age and comorbidities.
Statistical Information
P-Value
0.04
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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