Browsing by Author "Moya Céspedes, Esteban Alexis."
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- ItemCardioventilatory Acclimatization Induced by Chronic Intermittent Hypoxia(2009) Iturriaga Agüera, Rodrigo; Rey Keim, Sergio; Río Troncoso, Rodrigo Andre del; Moya Céspedes, Esteban Alexis.
- ItemCarotid body and cardiorespiratory alterations in intermittent hypoxia: the oxidative link(2010) Río Troncoso, Rodrigo Andre del; Moya Céspedes, Esteban Alexis.; Iturriaga Agüera, Rodrigo
- ItemCarotid body potentiation during chronic intermittent hypoxia: implication for hypertension(2014) Río Troncoso, Rodrigo Andre del; Moya Céspedes, Esteban Alexis.; Iturriaga Agüera, Rodrigo
- ItemCarotid body potentiation induced by intermittent hypoxia: Implications for cardiorespiratory changes induced by sleep apnoea(2009) Iturriaga Agüera, Rodrigo; Moya Céspedes, Esteban Alexis.; Río Troncoso, Rodrigo Andre del
- ItemContribution of inflammation on carotid body chemosensory potentiation induced by intermittent hypoxia(2012) Río Troncoso, Rodrigo Andre del; Moya Céspedes, Esteban Alexis.; Iturriaga Agüera, Rodrigo
- ItemDifferential expression of pro-inflammatory cytokines, endothelin-1 and nitric oxide synthases in the rat carotid body exposed to intermittent hypoxia(2011) Río Troncoso, Rodrigo Andre del; Moya Céspedes, Esteban Alexis.; Iturriaga Agüera, Rodrigo
- ItemEffects of vagotomy on cardiovascular and heart rate variability alterations following chronic normobaric hypoxia in adult rabbits(2018) Alcayaga Urbina, Julio Andrés; Río Troncoso, Rodrigo Andre del; Moya Céspedes, Esteban Alexis.; Freire, Matías.; Iturriaga Agüera, RodrigoAbstract Background chronic hypoxia increases basal ventilation and pulmonary vascular resistance, with variable changes in arterial blood pressure and heart rate, but it’s impact on heart rate variability and autonomic regulation have been less well examined. We studied changes in arterial blood pressure, heart rate and heart rate variability (HRV) in rabbits subjected to chronic normobaric hypoxia (CNH; PB ~ 719 mmHg; FIO2 ~ 9.2%) for 14 days and assess the effect of autonomic control by acute bilateral vagal denervation. Results exposure to CNH stalled animal weight gain and increased the hematocrit, without affecting heart rate or arterial blood pressure. Nevertheless, Poincaré plots of the electrocardiographic R–R intervals showed a reduced distribution parallel to the line of identity, which interpreted as reduced long-term HRV. In the frequency domain, CNH reduced the very-low- (< 0.2 Hz) and high-frequency components (> 0.8 Hz) of the R–R spectrograms and produced a prominent component in the low-frequency component (0.2–0.5 Hz) of the power spectrum. In control and CNH exposed rabbits, bilateral vagotomy had no apparent effect on the short- and long-term HRV in the Poincaré plots. However, bilateral vagotomy differentially affected higher-frequency components (> 0.8 Hz); reducing it in control animals without modifying it in CNH-exposed rabbits. Conclusions These results suggest that CNH exposure shifts the autonomic balance of heart rate towards a sympathetic predominance without modifying resting heart rate or arterial blood pressure.
- ItemEvidence for Histamine as a New Modulator of Carotid Body Chemoreception(2009) Río Troncoso, Rodrigo Andre del; Moya Céspedes, Esteban Alexis.; Iturriaga Agüera, Rodrigo
- ItemInflammation and oxidative stress during intermittent hypoxia: the impact on chemoreception(2015) Iturriaga Agüera, Rodrigo; Moya Céspedes, Esteban Alexis.; Río Troncoso, Rodrigo Andre del
- ItemModulatory effects of histamine on cat carotid body chemoreception(2008) Río Troncoso, Rodrigo Andre del; Moya Céspedes, Esteban Alexis.; Iturriaga Agüera, Rodrigo
- ItemRabbit Ventilatory Responses to Peripheral Chemoexcitators: Effects of Chronic Hypoxia(2012) Alcayaga Urbina, Julio Andrés; Río Troncoso, Rodrigo Andre del; Moya Céspedes, Esteban Alexis.; Iturriaga Agüera, Rodrigo