What question did this study set out to answer?

The aim is to explore how different models characterize the spatiotemporal dynamics of left ventricular isovolumic relaxation.

December 31, 2011AJP Heart and Circulatory Physiology

Spatio-temporal attributes of left ventricular pressure decay rate during isovolumic relaxation

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Population

20 subjects

Design

Other

Authors

EGErina GhoshCambridge Hospital SKSándor J. KovácsHUN-REN Institute for Nuclear Research

Discussion

Member takes

Implication

Single-site LV pressure decay assessment may miss spatiotemporal variation; hypothesis-generating for multi-site or kinematic modeling of relaxation.

Key Points

The aim is to explore how different models characterize the spatiotemporal dynamics of left ventricular isovolumic relaxation.
Recorded left ventricular pressures in 20 subjects using a high-fidelity multi-pressure transducer.
Computed pressure decay parameters (tau, mu, E(k)) from simultaneous dual-channel pressure data over 1631 beats.
Analyzed differences in parameters between channels and their implications on IVR.
Tau showed significant differences between channels in 16 of 20 subjects (P < 0.05).
Mu and E(k) parameters differed significantly across all subjects (P < 0.05).
Findings suggest that single location assessments underestimate the complexity of IVR dynamics.

Structured PICO

Population

20 subjects

Intervention

Measurement of left ventricular pressures using a high-fidelity, multipressure transducer catheter (3 cm apart)

Outcome

Spatiotemporal variation of isovolumic relaxation rate parameters (τ, μ, and E(k)) between two measurement locationssurrogate

Quantifying left ventricular relaxation rate from a single location has limitations due to significant spatio-temporal variation, which is better characterized by kinematic models.

Cite This Study

Ghosh et al. (2011) studied this question.

synapsesocial.com/papers/6a1d024ecc9f7df1b704bd7e https://doi.org/10.1152/ajpheart.00990.2011

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Implication

Single-site LV pressure decay assessment may miss spatiotemporal variation; hypothesis-generating for multi-site or kinematic modeling of relaxation.

Spatio-temporal attributes of left ventricular pressure decay rate during isovolumic relaxation

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Spatio-temporal attributes of left ventricular pressure decay rate during isovolumic relaxation

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Also Consider