Počet záznamů: 1
Variability of Phase Shift Between Blood Pressure and Heart Rate Fluctuations - A Marker of Short-Term Circulation Control
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SYSNO ASEP 0205681 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Variability of Phase Shift Between Blood Pressure and Heart Rate Fluctuations - A Marker of Short-Term Circulation Control Tvůrce(i) Halámek, Josef (UPT-D) RID, ORCID, SAI
Kára, T. (CZ)
Jurák, Pavel (UPT-D) RID, ORCID, SAI
Souček, M. (CZ)
Francis, D. (GB)
Davies, L. C. (GB)
Shen, W. K. (US)
Coats, A. J. (GB)
Novák, M. (CZ)
Nováková, Z. (CZ)
Panovský, R. (CZ)
Toman, J. (CZ)
Šumbera, J. (CZ)
Somers, V. K. (US)Zdroj.dok. Circulation - ISSN 0009-7322
Roč. 108, č. 3 (2003), s. 292 - 297Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova baroreceptors ; respiration ; sudden death Vědní obor RIV FA - Kardiovaskulární nemoci vč. kardiochirurgie CEP GA102/00/1262 GA ČR - Grantová agentura ČR GA102/02/1339 GA ČR - Grantová agentura ČR CEZ AV0Z2065902 - UPT-D Anotace Background - We postulated that the variability of the phase shift between blood pressure and heart rate fluctuation near the frequency of 0.10 Hz might be useful in assessing autonomic circulatory control. Methods and Results - We tested this hypothesis in 4 groups of subjects: 28 young, healthy individuals; 13 elderly healthy individuals; patients with coronary heart disease; and 19 patients with a planned or implanted cardioverter-defibrillator (ICD recipients). Data from 5 minutes of free breathing and at 2 different, controlled breathing frequencies (0.10 and 0.33 Hz) were used. Clear differences (P<0.001) in variability of phase were evident between the ICD recipients and all other groups. Furthermore, at a breathing frequency of 0.10 Hz, differences in baroreflex sensitivity (P<0.01) also became evident, even though these differences were not apparent at the 0.33-Hz breathing frequency. Conclusions - The frequency of 0.01 Hz represents a useful and potentially important one for controlled breathing, at which differences in blood pressure - RR interactions become evident. These interactions, whether computed as a variability of phase to define stability of the blood pressure-heart rate interaction or defined as the baroreflex sensitivity to define the gain in heart rate response to blood pressure changes, are significantly different in patients at risk for sudden arrhythmic death. In young versus older healthy individuals, only baroreflex gain is different, with the variability of phase being similar in both groups. The measurements of short-term circulatory control might help in risk stratification for sudden cardiac death. Pracoviště Ústav přístrojové techniky Kontakt Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Rok sběru 2004
Počet záznamů: 1