Dynamics of low-frequency oscillations in heart rate in chronic heart failure patients during load tests under 0.1 Hz controlled breathing

dc.contributor.author	Kiselev, Anton R.	en
dc.contributor.author	Gridnev, Vladimir I.	en
dc.contributor.author	Posnenkova, Olga M.	en
dc.date.accessioned	2014-07-18T01:14:03Z
dc.date.available	2014-07-18T01:14:03Z
dc.date.issued	2014-07-18
dc.identifier.uri	http://hdl.handle.net/11400/1383
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.source	www.hsj.gr	en
dc.subject	Αρρυθμία
dc.subject	Χρονια καρδιακή ανεπάρκεια
dc.subject	Heart rate variability
dc.subject	Chronic heart failure
dc.subject	0.1 Hz oscillation
dc.subject	Load test
dc.title	Dynamics of low-frequency oscillations in heart rate in chronic heart failure patients during load tests under 0.1 Hz controlled breathing	en
heal.type	journalArticle
heal.generalDescription	Short research article	en
heal.classification	Medicine--Nursing
heal.classification	Ιατρική
heal.classificationURI	N/A-Medicine--Nursing
heal.classificationURI	N/A-Ιατρική
heal.language	en
heal.access	free
heal.recordProvider	Τεχνολογικό Εκπαιδευτικό Ίδρυμα Αθήνας.Σχολή Επαγγελμάτων Υγείας και Πρόνοιας. Τμήμα Νοσηλευτικής	el
heal.publicationDate	2013-03
heal.bibliographicCitation	Kiselev, A.R., Gridnev, V.I., Posnenkova, O.M. (2013). Dynamics of low-frequency oscillations in heart rate in chronic heart failure patients during load tests under 0.1 Hz controlled breathing. "Health Science Journal". 7 (1), 90-98.	en
heal.abstract	Background. Low-frequency (LF) oscillations in heart rate (HR) are largely an index of baroreflex gain. Controlled 0.1 Hz breathing maybe used as input stimuli for study of this resonance phenomenon in LF oscillations in HR. The aim of this study was the investigation of the dynamic characteristics of LF oscillations in the heart rate (HR) of chronic heart failure (CHF) patients during bicycle exercise (BE) tests, under 0.1 Hz controlled breathing. Methods. Forty five male patients aged 50±3 years with left ventricle ejection fraction (EF) <50% and 35 male patients aged 52±6 years with EF>50% participated in the study. BE tests were performed for all participants. Five-minute recording of R-R intervals was performed first in sedentary posture and in 25 W load stage of BE test. The frequency estimates of heart rate variability in LF spectrum bands were obtained. Results. Under the load rising till 25 W in CHF patients with EF<50%, consequent depression of LF band power was observed 2-3 times in comparison with the relaxed condition. There was no similar significant expressed dynamic in the group with EF>50%. Conclusions. The stability of LF oscillations in HR to low-intensity loads depends from the severity of myocardial contractility damage. The power dynamic of 0.1 Hz component of the heart rate variability spectrum may be considered an independent index of dynamic stability of the heart autonomic control in CHF patients.	en
heal.publisher	Μαρβάκη, Χριστίνα	el
heal.journalName	Health Science Journal	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true
heal.dateCreated	2013-01