What is the clinical evidence from this study?

Study design: Other. Population: Post-acidosis ventricular arrhythmia. Intervention: Computer simulation of pH restoration protocols vs. Normal conditions. Primary outcome: Generation of delayed afterdepolarizations (DADs) and premature ventricular complexes (PVCs).

March 30, 2017Frontiers in PhysiologyOpen Access

Mechanisms Underlying the Emergence of Post-acidosis Arrhythmia at the Tissue Level: A Theoretical Study

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Key result

Simulations link acidosis-induced SR calcium overload and altered source-sink interactions to post-acidosis ventricular arrhythmias.

Why the study?

Does simulated acidosis and subsequent pH recovery induce delayed afterdepolarizations and re-entry arrhythmias in human ventricular tissue models?

Population

Computer models of human ventricular cells incorporated into 1D fiber and 2D sheet tissue models

Comparison

Simulated acidosis followed by post-acidosis… vs Normal physiological pH conditions (pH 7.15)

Design

Preclinical

Authors

JBJieyun BaiFirst Affiliated Hospital of Jinan University RYRenli YinSouth China Agricultural University KWKuanquan WangElectrophysiology

Discussion

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Implication

May explain post-acidosis arrhythmia mechanisms in models; hypothesis-generating and requires in vivo validation before clinical relevance.

Structured PICO

Does simulated acidosis and subsequent pH recovery induce delayed afterdepolarizations and re-entry arrhythmias in human ventricular tissue models?

Population

Computer models of human ventricular cells (modified ten Tusscher-Panfilov TP06 model) incorporated into 1D fiber (100 myocytes) and 2D sheet (100 × 500 grid points) tissue models

Intervention

Simulated acidosis (intracellular pH 6.7) followed by post-acidosis (pH 7.15) with varying pH recovery rates (0.1 to 4 minutes)

Comparator

Normal physiological pH conditions (pH 7.15)

Outcome

Emergence of delayed afterdepolarizations (DADs), premature ventricular complexes (PVCs), and vulnerability to unidirectional conduction block leading to re-entrysurrogate

Computational modeling demonstrates that acidosis-induced cellular electrophysiological alterations and altered source-sink interactions increase susceptibility to post-acidosis ventricular arrhythmias.

Limitations

The study relies on theoretical computer models which may not fully capture the complex in vivo environment of human ischaemia-reperfusion injury.

Cite This Study

Bai et al. (2017) studied Post-acidosis ventricular arrhythmia. Computer simulation of pH restoration protocols vs. Normal conditions was evaluated on Generation of delayed afterdepolarizations (DADs) and premature ventricular complexes (PVCs). Computer simulations demonstrated that acidosis-induced sarcoplasmic reticulum calcium overload and altered source-sink interactions increase susceptibility to post-acidosis ventricular arrhythmias.

synapsesocial.com/papers/6a0883c27de338f10b10bece https://doi.org/10.3389/fphys.2017.00195

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Implication

May explain post-acidosis arrhythmia mechanisms in models; hypothesis-generating and requires in vivo validation before clinical relevance.

Mechanisms Underlying the Emergence of Post-acidosis Arrhythmia at the Tissue Level: A Theoretical Study

Discussion

Member takes

Implication

Structured PICO

Limitations

Cite This Study

Mechanisms Underlying the Emergence of Post-acidosis Arrhythmia at the Tissue Level: A Theoretical Study

Discussion

Member takes

Implication

Structured PICO

Limitations

Cite This Study

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Also Consider