ISSN:
1432-2013
Keywords:
Shrew
;
Heart
;
Electrocardiogram
;
Impulse Conducting Tissue
;
Spitzmaus
;
Herz
;
Elektrokardiogramm
;
Reizleitungssystem
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary The impulse conducting system (ICS) in the heart of the Asian musk shrew,Suncus murinus, was investigated by means of electrocardiography and light microscopy. In contrast to recent results denying an ICS in this species there exists a physiologically and morphologically well defined conductile tissue not differing from that in other mammals. Recognizable and typical EGGs were obtained with a P wave, PQ interval, QRS complex, and T wave. In accordance with the electrocardiographical pattern, anatomical examination revealed an ICS consisting of a SA node, AV node, AV bundle and ventricular Purkinje system (limbs and terminal branches). Histologically the specific tissue differs from the working myocardium by having fewer myofibrils, mitochondria, and blood vessels. Moreover the AV system is partially surrounded by a connective tissue sheath.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00586447
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