February 1, 1989Circulation ResearchOpen Access

Vagally induced block and delayed conduction as a mechanism for circus movement tachycardia in frog atria.

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Population

39 preparations of spontaneously beating isolated atria of frog (Rana temporaria)

Design

Preclinical

Authors

LRLeonid V. RosenshtraukhInstitute of Experimental Cardiology АЗА. В. ЗайцевLomonosov Moscow State University VFVladimir G. FastUniversity of Alabama at Birmingham

Discussion

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Implication

May initiate reentry via vagal block in amphibian atria; leaves open applicability to clinical atrial tachyarrhythmias.

Structured PICO

Population

39 preparations of spontaneously beating isolated atria of frog (Rana temporaria)

Intervention

Strong vagal stimulation causing sinus arrest, with multielectrode mapping

Outcome

Mechanism and characteristics of vagally induced tachycardia (circus movement, conduction velocity, unblocking delay)surrogate

Vagally induced conduction block and delayed unblocking can initiate circus movement tachycardia in frog atria from a single sinus impulse, independent of inhomogeneous refractoriness and extrabeats.

Cite This Study

Rosenshtraukh et al. (1989) studied this question.

synapsesocial.com/papers/6a20e28110699ec7be2aafe4 https://doi.org/10.1161/01.res.64.2.213

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Vagally induced block and delayed conduction as a mechanism for circus movement tachycardia in frog atria.

Discussion

Member takes

Implication

Structured PICO

Cite This Study

Vagally induced block and delayed conduction as a mechanism for circus movement tachycardia in frog atria.

Discussion

Member takes

Implication

Structured PICO

Cite This Study

Also Consider

Also Consider