What question did this study set out to answer?

To explore how aging affects the monophasic action potential duration and effective refractory period of rat atria, particularly focusing on differences between the right and left atrium.

January 1, 2006Circulation JournalOpen Access

Differences in the Aging-Associated Trends of the Monophasic Action Potential Duration and Effective Refractory Period of the Right and Left Atria of the Rat

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Population

30 Wistar rats divided into 3 age groups: adult, middle-aged, and aged (n=20 per group)

Comparison

Aging (adult, middle-aged, and aged groups) vs Comparison between different age groups

Design

Preclinical

Authors

CHCongxin HuangElectrophysiology WDWenmao DingWuhan University LLLan LiCentral South University

Discussion

Member takes

Implication

Differential right-left atrial aging may contribute to AF substrate; hypothesis-generating in rats and leaves open human translation.

Key Points

To explore how aging affects the monophasic action potential duration and effective refractory period of rat atria, particularly focusing on differences between the right and left atrium.
30 Wistar rats divided into adult, middle-aged, and aged groups (n=20 per group).
Hearts perfused using Langendorff apparatus to measure MAPD(90) and ERP at various stimulation cycle lengths.
Comparative analysis of electrophysiological changes between right and left atria across age groups.
In the aged group, MAPD(90) of the right atrium was significantly prolonged compared to adults, while the left atrium showed a reduction in MAPD(90) with aging.
ERP demonstrated similar aging patterns to MAPD(90) across both atria.
Increased stimulation frequency led to greater shortening of MAPD(90) in the right atrium of the aged group compared to the left.

Structured PICO

Population

30 Wistar rats divided into 3 age groups: adult, middle-aged, and aged (n=20 per group)

Intervention

Aging (adult, middle-aged, and aged groups)

Comparator

Comparison between different age groups (adult vs. middle-aged vs. aged)

Outcome

Monophasic action potential duration at 90% repolarization (MAPD90) and effective refractory period (ERP) at the basic stimulation cycle length (400 ms)surrogate

Aging is associated with differential electrophysiological changes in the right and left atria, which may contribute to the substrate for atrial fibrillation in older hearts.

Cite This Study

Huang et al. (2006) studied this question.

synapsesocial.com/papers/6a6f71268031ec7bb1dbc015 https://doi.org/10.1253/circj.70.352

Topics

Atrial fibrillation Persistent AF management

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Differences in the Aging-Associated Trends of the Monophasic Action Potential Duration and Effective Refractory Period of the Right and Left Atria of the Rat

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Topics

Differences in the Aging-Associated Trends of the Monophasic Action Potential Duration and Effective Refractory Period of the Right and Left Atria of the Rat

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Topics

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