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Spontaneous Rhythms in Physiological Control Systems
Nature, 1971MEAN arterial blood pressure in man undergoes spontaneous and broadly repetitive fluctuations with a typical period of about 10 s. We present an explanation for these fluctuations which we believe may also be applicable to the vasomotor activity associated with thermoregulation and therefore widely relevant.
B W, Hyndman, R I, Kitney, B M, Sayers
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On the Control of Cardiac Rhythm
1973The importance of controlled variation of cardiac rhythm need hardly be stressed. A successful solution of this problem would make it possible to control a number of pathological conditions such as auricular and ventricular flutter, extrasystole, and high- or low-frequency rhythms.
Yu. A. Vlasov, A. T. Kolotov
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Controlled Rhythm: An Analysis of 88 Cycles
Fertility and Sterility, 196820 female volunteers at Bostons Peter Brigham Hospital received an estrogen-progesterone combination through 88 cycles in a study to determine the efficacy of such a regimen as an aid to the rhythm method of contraception. Subjects were divided into 2 groups on the basis of menstrual regularity: Group 1 consisted of 3 women whose cycles had varied in ...
C L, Lorenzo, S H, Sturgis
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[Rate control or rhythm control].
Annales de cardiologie et d'angeiologie, 2010Rhythm control or rate control are the 2 therapeutic strategies for atrial fibrillation (AF) management. Despite strong physiological and epidemiological data to support a rhythm control strategy, the results of the prospective studies, especially AFFIRM and RACE trials, did not demonstrate any superiority of a rhythm control versus a rate control ...
Ph, Mabo, D, Pavin, E, Donal
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Genetic control of biological rhythms: Independent expression of each rhythm parameter
Life Sciences, 1995Biological rhythm whose pattern approaches a sinusoidal curve can be characterized by four parameters: Period, Mesor, Acrophase and Amplitude. Inheritance patterns of these parameters were assessed by monitoring White Blood Cell (WBC) count rhythms of C57BL/6J mice, BALB/c mice and the F1 progeny prior and after injection of Cisplatinum at either 0900,
L, Peleg, A, Zvulunov, I E, Ashkenazi
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How are Insect Circadian Rhythms Controlled?
Nature, 1969A review of available evidence—mostly involving the cockroach—suggests that insect circadian rhythms are not controlled primarily by hormones. The primary pace-maker seems rather to be electrical, acting through the ventral nerve cord.
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Rhythm Control versus Rate Control for Atrial Fibrillation
New England Journal of Medicine, 2008info:eu-repo/semantics ...
Knecht, Sébastien +2 more
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Development of Electric Control of Cardiac Rhythm
JAMA: The Journal of the American Medical Association, 1973Techniques for electric control of cardiac rhythm began with the demonstration of an action current preceding each myocardial contraction. Next came direct stimulation and countershock defibrillation with electrodes placed directly on the exposed heart.
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Atrial Fibrillation — Rhythm or Rate Control
New England Journal of Medicine, 2002The human heart has a complex electrical system that ensures coordinated propulsion of blood under a variety of physiologic conditions. Remarkable effort is expended with each heartbeat to maintain sinus rhythm. Arrhythmias are a system failure — and none more so than atrial fibrillation.
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RNA Dynamics in the Control of Circadian Rhythm
2016The circadian oscillator is based on transcription-translation feedback loops that generate 24 h oscillations in gene expression. Although circadian regulation of mRNA expression at the transcriptional level is one of the most important steps for the generation of circadian rhythms within the cell, multiple lines of evidence point to a disconnect ...
Benegiamo, Giorgia +2 more
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