What question did this study set out to answer?

To investigate the developmental evolution of action potential propagation, repolarization patterns, and electrogram morphology in cultured neonatal rat ventricular myocyte monolayers.

November 1, 2001Journal of Cardiovascular Electrophysiology

Evolution of Action Potential Propagation and Repolarization in Cultured Neonatal Rat Ventricular Myocytes

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Population

Cultured neonatal rat ventricular myocytes (NRVM)

Design

Preclinical

Follow-up

8 days

Authors

GMGideon MeiryWestern Galilee Hospital YRYotam ReisnerTechnion – Israel Institute of Technology YFYair FeldSunnybrook Health Science Centre

Discussion

Member takes

Implication

May support cultured neonatal rat myocytes as an in vitro arrhythmia model; leaves open human translation.

Key Points

To investigate the developmental evolution of action potential propagation, repolarization patterns, and electrogram morphology in cultured neonatal rat ventricular myocyte monolayers.
Cultured neonatal rat ventricular myocytes into spontaneously beating monolayers monitored from day 3 to day 8 in vitro.
Mapped spatial activation and repolarization characteristics using a 60-unipolar-electrode multielectrode array data acquisition system.
QRS amplitude, maximal dV/dt, and T wave amplitude increased with culture age, while QT interval duration progressively decreased.
Conduction velocity showed a non-linear trajectory, increasing modestly between days 3 and 5 before steadily declining toward day 8.
Organization of uniform activation and repolarization patterns occurred in parallel with the maturation of connexin43 gap junction distribution.

Structured PICO

Population

Cultured neonatal rat ventricular myocytes (NRVM)

Intervention

Culture maturation over 8 days

Outcome

Propagation and repolarization patterns (QRS amplitude, dV/dt(max), QT interval, T wave amplitude, conduction velocity)surrogate

Cultured neonatal rat ventricular myocytes develop organized activation and repolarization patterns over 8 days, providing a useful in vitro model for studying arrhythmia mechanisms.

Cite This Study

Meiry et al. (2001) studied this question.

synapsesocial.com/papers/6a75867006e84d3015dd754c https://doi.org/10.1046/j.1540-8167.2001.01269.x

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Evolution of Action Potential Propagation and Repolarization in Cultured Neonatal Rat Ventricular Myocytes

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Evolution of Action Potential Propagation and Repolarization in Cultured Neonatal Rat Ventricular Myocytes

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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