Inter-relations among declines in arterial distensibility, baroreflex function and respiratory sinus arrhythmia
نویسندگان
چکیده
منابع مشابه
Point:counterpoint: respiratory sinus arrhythmia is due to a central mechanism vs. respiratory sinus arrhythmia is due to the baroreflex mechanism.
Blood pressure and heart periods fluctuate at respiratory frequencies in healthy humans. Some researchers (8, 23) explain this as a cause-and-effect relation: blood pressure changes trigger baroreflex-mediated R-R interval changes. Here I make the case that respiratory sinus arrhythmia is a central phenomenon that is independent of blood pressure changes. I base this argument on several well-do...
متن کاملSkin conductance reactivity and respiratory sinus arrhythmia among maltreated and comparison youth: relations with aggressive behavior.
OBJECTIVE The goal of this study was to examine respiratory sinus arrhythmia (RSA), an indicator of parasympathetic nervous system-linked cardiac activity, and skin conductance level (SCL), a sympathetic indicator, as moderators of the link between child maltreatment and adolescent aggression. METHOD Participants were 234 maltreated (48.3% male) and 128 (57.8% male) comparison youth aged 9-16...
متن کاملDiminishment of Respiratory Sinus Arrhythmia
Background. The development of a microcomputer-based device permits quick, simple, and noninvasive quantification of the respiratory sinus arrhythmia (RSA) during quiet breathing. Methods and Results. We prospectively and serially measured the radionuclide left ventricular ejection fraction and the RSA amplitude in 34 cancer patients receiving up to nine monthly bolus treatments with doxorubici...
متن کاملComments on point:counterpoint: respiratory sinus arrhythmia is due to a central mechanism vs. respiratory sinus arrhythmia is due to the baroreflex mechanism.
TO THE EDITOR: Respiratory sinus arrhythmia (RSA) is a complex phenomenon whose physiological role is still a matter of debate (6). From a practical point of view, it is important to know whether RSA can be used to compute indexes of cardiac baroreflex sensitivity, hence the present Point:Counterpoint article (2, 4). A direct approach to the question of baroreflex involvement in the production ...
متن کاملLast word on point:counterpoint: respiratory sinus arrhythmia is due to a central mechanism vs. respiratory sinus arrhythmia is due to the baroreflex mechanism.
TO THE EDITOR: Science is not decided by democratic vote. If it were, my “Counterpoint” would now probably be counted as outvoted. I thank those who took part in this debate and I will reciprocate below. First, let me add a note on the function and importance of modeling in physiology as I see it. For too long we have accepted intricate reasoning in the discussion section of physiological studi...
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ژورنال
عنوان ژورنال: Journal of the American College of Cardiology
سال: 2002
ISSN: 0735-1097
DOI: 10.1016/s0735-1097(02)01787-4