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Titolo:
POWER SPECTRAL-ANALYSIS OF HEART-RATE-VARIABILITY DURING UPRIGHT TILTTEST - A COMPARISON OF PATIENTS WITH SYNCOPE AND NORMAL SUBJECTS
Autore:
BOULOS M; BARRON S; NICOLSKI E; MARKIEWICZ W;
Indirizzi:
RAMBAM MED CTR,DEPT CARDIOL,POB 9602 IL-31096 HAIFA ISRAEL RAMBAM MED CTR,DEPT CARDIOL IL-31096 HAIFA ISRAEL
Titolo Testata:
Cardiology
fascicolo: 1, volume: 87, anno: 1996,
pagine: 28 - 32
SICI:
0008-6312(1996)87:1<28:PSOHDU>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
UNEXPLAINED SYNCOPE; AUTONOMIC FUNCTION; BETA-BLOCKADE; UP TILT; COMPONENTS;
Keywords:
SYNCOPE; HEART RATE; AUTONOMIC NERVOUS SYSTEM; SYMPATHETIC NERVOUS SYSTEM; PARASYMPATHETIC NERVOUS SYSTEM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
M. Boulos et al., "POWER SPECTRAL-ANALYSIS OF HEART-RATE-VARIABILITY DURING UPRIGHT TILTTEST - A COMPARISON OF PATIENTS WITH SYNCOPE AND NORMAL SUBJECTS", Cardiology, 87(1), 1996, pp. 28-32

Abstract

We analyzed heart variability (HRV) response to tilt in 35 patients with a history of neurocardiogenic syncope and in 8 normal volunteers. Frequency domain examination was performed using power spectral analysis of RR variability during resting supine position and during the 256beats preceding the onset of syncope or completion of 60 min of upright tilt to 70 degrees. Both low (0.05-0.15 Hz) and high frequency (0.15-0.4 Hz) spectral components of HRV increased markedly in all groups as a result of tilting. Statistically significant differences were noted between the patient groups at completion of upright tilting. However, these differences in spectral components between groups were of small magnitude when compared to the overall increase in spectral power occurring in all groups as a result of the tilt and are difficult to correlate clinically with the appearance, or lack of appearance of tilt-induced syncope. Power spectral analysis of HRV, as presently performed, appears to lack discriminative power to detect the rapid and markedchanges in sympathovagal modulation known to occur during tilt test in patients with neurocardiogenic syncope.

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Documento generato il 02/04/20 alle ore 18:09:41