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Titolo:
Cardiorespiratory interactions during periodic breathing in awake chronic heart failure patients
Autore:
Pinna, GD; Maestri, R; Mortara, A; La Rovere, MT;
Indirizzi:
S Maugeri Fdn, Inst Care & Sci Res, Rehabil Inst Montescano, Dept Biomed Engn, I-27040 Montescano, Italy S Maugeri Fdn Montescano Italy I-27040 d Engn, I-27040 Montescano, Italy S Maugeri Fdn, Inst Care & Sci Res, Rehabil Inst Montescano, Dept Cardiol,I-27040 Montescano, Italy S Maugeri Fdn Montescano Italy I-27040 Cardiol,I-27040 Montescano, Italy
Titolo Testata:
AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY
fascicolo: 3, volume: 278, anno: 2000,
pagine: H932 - H941
SICI:
0363-6135(200003)278:3<H932:CIDPBI>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHEYNE-STOKES RESPIRATION; SPECTRAL-ANALYSIS; VENTILATORY RESPONSE; VARIABILITY SIGNALS; SLEEP; HUMANS; OSCILLATIONS; MECHANISM; EXERCISE; PRESSURE;
Keywords:
chemoreceptors; cardiopulmonary receptors; cardiovascular variability; spectral analysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Pinna, GD Ctr Med Montescano, Serv Bioingn, I-27040 Montescano, Italy Ctr Med Montescano Montescano Italy I-27040 Montescano, Italy
Citazione:
G.D. Pinna et al., "Cardiorespiratory interactions during periodic breathing in awake chronic heart failure patients", AM J P-HEAR, 278(3), 2000, pp. H932-H941

Abstract

We applied spectral techniques to the analysis of cardiorespiratory signals [instantaneous lung volume (ILV), instantaneous tidal volume (ITV), arterial O-2 saturation (Sa(o2)) at the ear, heart rate (HR), systolic (SAP), and diastolic (DAP) arterial pressure] during nonapneic periodic breathing (PB) in 29 awake chronic heart failure (CHF) patients and estimated the timing relationships between respiratory and slow cardiovascular (<0.04 Hz) oscillations. Our aim was 1) to elucidate major mechanisms involved in cardiorespiratory interactions during PB and 2) to test the hypothesis of a centralvasomotor origin of PB. All cardiovascular signals were characterized by adominant (greater than or equal to 84% of total power) oscillation at the frequency of PB (mean +/- SE: 0.022 +/- 0.0008 Hz), highly coherent (greater than or equal to 0.89), and delayed with respect to ITV (ITV-HR, 2.4 +/- 0.72 s; ITV-SAP, 6.7 +/- 0.65 s; ITV-DAP, 3.2 +/- 0.61 s; P < 0.01). Sa(o2)was highly coherent with (coherence function = 0.96 +/- 0.009) and almost opposite in phase to ITV. These findings demonstrate the existence of a generalized cardiorespiratory rhythm led by the ventilatory oscillation and suggest that 1) the cyclic increase in inspiratory drive and cardiopulmonary reflexes and 2) mechanical effects of PB-induced changes in intrathoracic pressure are the more likely sources of the HR and blood pressure oscillations, respectively. The timing relationship between ITV and blood pressure signals excludes the possibility that PB represents the effect of a central vasomotor rhythm.

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Documento generato il 12/07/20 alle ore 04:45:46