What question did this study set out to answer?

To evaluate the involvement and necessity of specialized atrial conduction pathways in the initiation and propagation of experimental circus movement atrial flutter.

March 1, 1978Circulation ResearchOpen Access

Participation of atrial specialized conduction pathways in atrial flutter.

Q: What does this research mean for the field?

Specialized internodal conduction pathways play an essential role in the genesis and maintenance of circus movement atrial flutter. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

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Why the study?

Do specialized internodal pathways participate in the genesis and maintenance of atrial flutter?

Population

Experimental models of atrial flutter

Comparison

Elevated potassium and surgical interruption of… vs Baseline or intact pathways

Design

Preclinical

Authors

GPGustavo Pastelı́nInstituto Nacional de Cardiología RMR MéndezCentre for Omic Sciences GMGordon K. MoeUtica College

Discussion

Member takes

Implication

Supports internodal targeting in experimental flutter; extends circus movement theory but leaves open human translation.

Key Points

To evaluate the involvement and necessity of specialized atrial conduction pathways in the initiation and propagation of experimental circus movement atrial flutter.
Induced self-sustained atrial flutter using high-frequency electrical stimulation at the left atrial insertion of Bachmann's bundle versus the right atrium, with and without artificial obstacles.
Assessed flutter maintenance during hyperkalemia (plasma potassium elevated to 9.5 mM/L) and following surgical transection of the middle and posterior internodal pathways.
Flutter was induced more easily via Bachmann's bundle than the right atrium and occurred with identical characteristics in the absence of artificial obstacles.
Elevated potassium at 9.5 mM/L induced complete electrical inactivation of atrial myocardium while sparing flutter wave activity in the vicinity of internodal pathways.
Surgical transection of the middle internodal pathway reduced flutter frequency, whereas combined transection of the middle and posterior pathways completely prevented flutter establishment.

Structured PICO

Do specialized internodal pathways participate in the genesis and maintenance of atrial flutter?

Population

Experimental models of atrial flutter

Intervention

Elevated potassium (plasma concentration 9.5 mM/liter) and surgical interruption of internodal pathways

Comparator

Baseline or intact pathways

Outcome

Induction, maintenance, and frequency of atrial fluttersurrogate

Specialized internodal pathways appear to play a critical role in the genesis and maintenance of circus movement atrial flutter.

Cite This Study

Pastelı́n et al. (1978) studied this question.

synapsesocial.com/papers/6a159929d64fa333899fdb8b https://doi.org/10.1161/01.res.42.3.386

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Participation of atrial specialized conduction pathways in atrial flutter.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Participation of atrial specialized conduction pathways in atrial flutter.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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