Results 281 to 290 of about 519,683 (351)
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Nonrespiratory Sinus Arrhythmia
American Journal of Critical Care, 2005Scenario: This continuous lead II rhythm strip was obtained in a 25-year-old woman admitted to the intensive care unit for intracerebral hemorrhage. The patient presented to the emergency department with a headache after a skateboarding accident. The patient stated that she “bumped” her head during the accident.
Stephanie S, Deboor +2 more
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Europace, 2019
AIMS Presence of arrhythmogenic left atrial (LA) low-voltage substrate (LVS) is associated with reduced arthythmia freedom rates following pulmonary vein isolation (PVI) in persistent atrial fibrillation (AF).
B. Müller-Edenborn +9 more
semanticscholar +1 more source
AIMS Presence of arrhythmogenic left atrial (LA) low-voltage substrate (LVS) is associated with reduced arthythmia freedom rates following pulmonary vein isolation (PVI) in persistent atrial fibrillation (AF).
B. Müller-Edenborn +9 more
semanticscholar +1 more source
Pediatrics, 1960
Though there are many comments on respiratory sinus arrhythmia in articles and textbooks, there have been surprisingly few data collected. We have presented data from 4,096 electrocardiograms of 199 healthy individuals on pulse rate, range (max. difference in cycle length), and frequency index (range/mean cycle lengthx100).
Richard Reeve, Kee DeBoer
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Though there are many comments on respiratory sinus arrhythmia in articles and textbooks, there have been surprisingly few data collected. We have presented data from 4,096 electrocardiograms of 199 healthy individuals on pulse rate, range (max. difference in cycle length), and frequency index (range/mean cycle lengthx100).
Richard Reeve, Kee DeBoer
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Sinus arrhythmia in rheumatic fever
American Heart Journal, 1961Abstract 1. 1. The degree (frequency index) of sinus arrhythmia was investigated in children suffering an initial attack of rheumatic fever (with and without carditis), in children with a recurrent attack, and in children with normal hearts who served as controls. 2. 2.
M C, JOSEPH, L, TENCKHOFF
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Arrhythmias and Sinus Node Dysfunction
JAMA: The Journal of the American Medical Association, 1984To the Editor. — Alpert and Flaker1have contributed an excellent review of arrhythmias associated with sinus node dysfunction. I wish to take exception to only one item, which, unfortunately, is a recurring source of confusion in many publications. In the author's Table 1, they list acute pericarditis as a cause of sinus node dysfunction.
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Analysis of vagally induced sinus arrhythmias
Journal of Theoretical Biology, 1992Vagal stimulation at precise times in successive cardiac cycles can elicit sinus arrhythmias. Two mechanisms have been identified that can, but do not necessarily, cause these vagally induced sinus arrhythmias. First, changes in cycle length elicited by a given concentration of acetylcholine (ACh) depend on the phase of the pacemaker cell action ...
F, Dexter, T, Yang, M N, Levy
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Respiration Sinus Arrhythmia in Psychotic Children
Psychophysiology, 1973ABSTRACTTen psychotic and 10 normal children, paired for age and sex, were compared for respiratory sinus arrhythmia differences under conditions of spontaneous and 5, 10, and 15 sec interval breathing. Cardiac rate and respiratory changes were simultaneously recorded. Parameters of degree of change and timing for each respiratory‐cardiac cycle and its
L R, Piggott +3 more
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Pacemaker Channels and Sinus Node Arrhythmia
Trends in Cardiovascular Medicine, 2004Cardiac pacemaker activity is regulated by at least five different classes of ion channels and by the opposing influence of sympathetic and parasympathetic stimulation. Inactivation of several genes, including a subunit coding for the potassium channel activated by the muscarinic receptor, I(KACh); the calcium channel, I(Ca,); and the hyperpolarization-
Juliane, Stieber +2 more
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2018
Sinus bradycardia and tachycardia are regular heart rhythms with unusual rate. In most cases, they are physiologic or secondary to another process and virtually never require direct treatment.
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Sinus bradycardia and tachycardia are regular heart rhythms with unusual rate. In most cases, they are physiologic or secondary to another process and virtually never require direct treatment.
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Sinus arrhythmia: clinical case
2023Introducción. La arritmia sinusal es una alteración del ritmo cardiaco, que no presenta sintomatología ni muestra anomalía en el nódulo sinusal. La causa más común es una lesión cerebral, provocada por el aumento de la presión intracraneal o hipoxia, que con frecuencia se manifiesta en personas jóvenes sanas por la variabilidad en la frecuencia ...
Calle Bermeo, Jessica Marcela +2 more
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