title: Heart rate variability analysis in postural orthostatic tachycardia syndrome: a case report.
abstract: The authors present a case of 36 year old male patient with idiopathic postural orthostatic tachycardia syndrome (POTS) diagnosed during head-up tilt testing. Power spectral analysis of heart rate variability (HRV) during the tilt test revealed that the ratio of low and high frequency powers (LF/HF) increased with the onset of orthostatic intolerance. This analysis confirmed in our patient a strong activation in sympathetic tone.
authors: Department of Cardiology, Second University of Naples, Naples - Italy.
authors: Vincenzo
authors: V
authors: Russo
authors: Ilaria
authors: I
authors: DE Crescenzo
authors: Ernesto
authors: E
authors: Ammendola
authors: Carolina
authors: C
authors: Pagano
authors: Cristina
authors: C
authors: Savarese
authors: Lucio
authors: L
authors: Santangelo
authors: Raffaele
authors: R
authors: Calabrò