What does this research mean for the field?

Low-frequency arterial blood pressure oscillations in anesthetized dogs are driven by changes in peripheral vascular resistance, which is likely generated by a central rhythm and lacks respiratory-frequency oscillations. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To investigate the variability of heart rate and arterial blood pressure in anesthetized dogs and the relationship between these measures.

January 1, 1995AJP Heart and Circulatory Physiology

Vascular resistance and arterial pressure low-frequency oscillations in the anesthetized dog

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Authors

ACAntonio CeveseUniversity of Verona RGR. GrassoUniversity of Rome Tor Vergata RPRoberto PoltronieriUniversity of Verona

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Implication

Supports mechanistic studies of vascular oscillations in models; does not inform clinical management of human BP or HR variability.

Key Points

To investigate the variability of heart rate and arterial blood pressure in anesthetized dogs and the relationship between these measures.
Chloralose-anesthetized dogs were used to record electrocardiogram, mean arterial pressure, and perfusion data for 5 minutes.
Autoregressive spectral and cross-spectral analyses were conducted to examine the frequency bands of the recorded signals.
Variability coefficients were calculated to assess the spontaneous variability of arterial pressure and heart rate.
Heart rate and arterial pressure oscillated at frequencies comparable to those in conscious humans.
Low-frequency arterial pressure oscillations were linked to changes in peripheral vascular resistance, with significant coherence between key variables.
Changes in heart rate preceded changes in arterial pressure and flow by more than 3 seconds, indicating a central rhythm of origin.

Cite This Study

Cevese et al. (1995) studied this question.

synapsesocial.com/papers/6a1c5cd1d54006be995feea9 https://doi.org/10.1152/ajpheart.1995.268.1.h7

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Vascular resistance and arterial pressure low-frequency oscillations in the anesthetized dog

Discussion

Member takes

Implication

Key Points

Cite This Study

Vascular resistance and arterial pressure low-frequency oscillations in the anesthetized dog

Discussion

Member takes

Implication

Key Points

Cite This Study

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