Heart rate variability in inappropriate sinus tachycardia.
Analysis of heart rate variability in patients with inappropriate sinus tachycardia showed a 24-hour decrease in all temporal and spectral indexes, even after attempted correction to a rate of 75 beats/min. This may have resulted from a global decrease in parasympathetic activity or from a rapid sinus rate produced by other ill-defined mechanisms.
Division of Cardiology of the University of Miami School of Medicine, Florida 33101, USA.
A
A
Castellanos
F
F
Moleiro
S
S
Chakko
H
H
Acosta
H
H
Huikuri
R D
RD
Mitrani
R J
RJ
Myerburg
D000328:Adult; D015716:Electrocardiography, Ambulatory / Q000379:methods; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D013616:Tachycardia, Sinus / Q000175:diagnosis / Q000503:physiopathology*