Purkinje fibers

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Purkinje fibers

[pər′kin·jē ‚fī·bərz]
(histology)
Modified cardiac muscle fibers composing the terminal portion of the conducting system of the heart.
References in periodicals archive ?
Thornell, "The development of Purkinje fibres and ordinary myocytes in the bovine fetal heart.
Eriksson, "The development of the Purkinje fibre system in the bovine fetal heart," Anatomy and Embryology, vol.
Objective: This study was planned to investigate ventricular myocardial excitation in birds in which Purkinje fibres penetrate into the ventricular wall and reach the epicardium to advance our knowledge about the evolution of the ventricular activation process in vertebrates.
In theory, in multifocal ("flash") activation of avian ventricular myocardium (1-3) caused by the specific distribution of Purkinje fibres that penetrate deeply into the ventricular wall and run close to the epicardium (1, 4, 5) there must not appear considerable disturbances in the myocardial activation pattern under local disturbances of conduction.
Similar changes have been found in the locus caeruleus and the cerebellar cortex, the loss of Purkinje fibres in the latter increasing markedly after the age of 60[31].