Age-related changes of cardiac parasympathetic modulation after vasovagal syncope.
The time-domain analysis of 24-hour electrocardiographic recordings showed that vagal modulation of heart rate is reduced within 48 hours from vasovagal syncope. However, patients with recent vasovagal syncope can be differentiated from healthy subjects only up to the age of 40 years with this analysis, because this parasympathetic modulation physiologically decreases with increasing age.
Lagi
A
A
Department of Internal Medicine, Santa Maria Nuova Hospital, Florence, Italy. lagi@dada.it
Cencetti
S
S
Fattorini
L
L
Tamburini
C
C
D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging / Q000502:physiology*; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000294:innervation; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D019462:Syncope, Vasovagal / Q000503:physiopathology*; D014630:Vagus Nerve / Q000503:physiopathology*