Brief Reviews: The Sinus Node as a Servomechanism
نویسندگان
چکیده
منابع مشابه
The effect of brief vagal stimulation on the isolated rabbit sinus node.
We developed an isolated rabbit atrial preparation which responds consistently and reproducibly to brief, submaximal stimulation of the autonomic nerves contained in it. In 6 of 11 preparations in the presence of propranolol (1 mg/liter), the time course of changes in the atrial rate following 120 msec vagal stimulation was bimodal. The maximal slowing occurred at 0.64 +/- 0.16 second, and the ...
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Dr. Weintraub et al. has written a comprehensive review of cognitive profiles among aging and dementias, comparing them to the neuropsychological deficits seen in Alzheimer’s disease (AD). The authors described the neuropsychological findings regarding episodic memory, language and semantic knowledge, executive functions, working memory and attention; and visuospatial abilities. The article hig...
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In 1971 Cramer [1] reported the characteristics of unambiguous measurement of sino-atrial conduction time, unipolar electrograms recorded in vitro from the pacethe identification of pacemaker shifts and the extent to maker region of the rabbit sinus node and subsequently which atrial impulses penetrate the node and act on the published similar records from the sinus pacemaker of the pacemaker. ...
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Sinus node dysfunction is de~ned as inappropriate sinus bradycardia or abnormal pauses in sinus mechanism. Sinus node dysfunction often coexists with atrial ~brillation, _utter, or tachycardia, and in such cases may be termed “tachy-brady syndrome.” Sinus node dysfunction may also be accompanied by abnormalities of AV conduction. Another term for sinus node dysfunction is “sick sinus syndrome.”...
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Castleman's disease is a rare benign lymphoproliferative disorder that frequently affects lymph nodes of the mediastinal thorax and the neck. It very rarely affects the renal sinus. We report a case of Castleman's disease arising in the renal sinus in a 64-year-old man. The patient visited the hospital with the chief complaint of hematuria. Abdominal computed tomography revealed a homogeneous m...
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ژورنال
عنوان ژورنال: Circulation Research
سال: 1973
ISSN: 0009-7330,1524-4571
DOI: 10.1161/01.res.32.3.307