What question did this study set out to answer?

To document and compare the precise cytoarchitecture and structural arrangements of the Purkinje fiber network across diverse mammalian species using light and electron microscopy.

January 1, 2009Archives of Histology and CytologyOpen Access

Morphological varieties of the Purkinje fiber network in mammalian hearts, as revealed by light and electron microscopy

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Key result

Light and electron microscopy revealed that the structural variety of the Purkinje fiber network in mammalian hearts can be classified into three groups, reflecting phylogeny and conducting function.

Population

Mammalian hearts from different species including ungulates, cetaceans, primates, carnivores, and rodents

Design

Preclinical

Authors

NONoriaki OnoThe University of Texas Health Science Center at Houston TYTakeshi YamaguchiHirosaki University HIHajime IshikawaShiga University of Medical Science

Discussion

Member takes

Implication

Classifies Purkinje networks phylogenetically in mammals; leaves open translation to human conduction disorders.

Key Points

To document and compare the precise cytoarchitecture and structural arrangements of the Purkinje fiber network across diverse mammalian species using light and electron microscopy.
Examined cardiac tissue across ungulates (sheep, goats), cetaceans (whales, dolphins), primates (humans, monkeys), carnivores (dogs, seals), and rodents (rats).
Employed light microscopy of silver-impregnated tissues to inspect reticular fiber sheaths and scanning electron microscopy of NaOH-digested tissues to observe three-dimensional cellular connections.
Ungulates and cetaceans (Group I) presented Purkinje strands of 2 to 8 oval cells with side-to-side and end-to-end junctions, collectively ensheathed by reticular fibers.
Primates and carnivores (Group II) formed delicate networks of cylindrical cells joined end-to-end and encircled individually by reticular fibers, while rodent Purkinje cells (Group III) structurally resembled ventricular cardiac myocytes.

Structured PICO

Population

Mammalian hearts from different species including ungulates (sheep, goats), cetaceans (whales, dolphins), primates (humans, monkeys), carnivores (dogs, seals), and rodents (rats)

Intervention

Light microscopy of silver impregnated tissues and scanning electron microscopy of NaOH digested tissues

Outcome

Cytoarchitecture of the Purkinje fiber networksurrogate

The structural variety of the Purkinje fiber network across mammalian species reflects their conducting function and phylogeny.

Cite This Study

Ono et al. (2009) studied this question. Light and electron microscopy revealed that the structural variety of the Purkinje fiber network in mammalian hearts can be classified into three groups, reflecting phylogeny and conducting function.

synapsesocial.com/papers/6a11fec0c031bb6829a5b629 https://doi.org/10.1679/aohc.72.139

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Morphological varieties of the Purkinje fiber network in mammalian hearts, as revealed by light and electron microscopy

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Morphological varieties of the Purkinje fiber network in mammalian hearts, as revealed by light and electron microscopy

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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Also Consider