What is the clinical evidence from this study?

Study design: Review. Population: Atrial fibrillation.

What question did this study set out to answer?

This research aims to explore the roles of calcium signalling microdomains and the t-tubular system in atrial myocytes, particularly concerning cardiac arrhythmias like atrial fibrillation.

February 5, 2013Cardiovascular Research

Calcium signalling microdomains and the t-tubular system in atrial mycoytes: potential roles in cardiac disease and arrhythmias

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Key result

The presence of a well-developed T-tubule network in the atria of large mammals synchronizes systolic calcium rise but may predispose them to calcium-dependent delayed afterdepolarizations and AF.

Population

Atrial myocytes from large mammals (including humans) and smaller laboratory species (e.g., rat)

Design

Review

Authors

ATAndrew W. TraffordElectrophysiology JCJessica D. ClarkeManchester Academic Health Science Centre MRMark A. RichardsPlanetary Science Institute

Discussion

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Implication

Warrants large-mammal models for atrial calcium studies; leaves open whether T-tubule targeting modulates AF risk.

Key Points

This research aims to explore the roles of calcium signalling microdomains and the t-tubular system in atrial myocytes, particularly concerning cardiac arrhythmias like atrial fibrillation.
Exploration of differences in systolic calcium regulation between species.
Assessment of t-tubule presence in atrial myocytes of large mammals versus smaller species.
Analysis of calcium transient dynamics and potential implications for arrhythmia development.
Large mammals exhibit a well-developed t-tubular network promoting synchronous calcium rise.
Absence of t-tubules in smaller species leads to heterogeneous calcium signalling.
T-tubules may increase susceptibility to delayed afterdepolarizations, contributing to atrial fibrillation.

Structured PICO

Population

Atrial myocytes from large mammals (including humans) and smaller laboratory species (e.g., rat)

Highlights inter-species differences in atrial myocyte calcium handling, suggesting that the T-tubule network in large mammals may be a key factor in their susceptibility to atrial fibrillation.

Cite This Study

Trafford et al. (2013) conducted a review in Atrial fibrillation. The presence of a well-developed T-tubule network in the atria of large mammals synchronizes systolic calcium rise but may predispose them to calcium-dependent delayed afterdepolarizations and AF.

synapsesocial.com/papers/6a20942d49fdfaecae8a2f77 https://doi.org/10.1093/cvr/cvt018

Topics

Atrial fibrillation Persistent AF management Heart failure HFrEF treatment

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Calcium signalling microdomains and the t-tubular system in atrial mycoytes: potential roles in cardiac disease and arrhythmias

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Topics

Calcium signalling microdomains and the t-tubular system in atrial mycoytes: potential roles in cardiac disease and arrhythmias

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Topics

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