Browsing by Author "Alcayaga Urbina, Julio Andrés"
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- ItemAblation of brainstem C1 neurons improves cardiac function in volume overload heart failure(2019) Andrade Andrade, David Cristóbal; Toledo, Camilo; Díaz, Hugo S.; Lucero, Claudia; Arce Álvarez, Alexis; Oliveira, Luis M.; Takakura, Ana C.; Moreira, Thiago S.; Schultz, Harold D.; Del Rio, Rodrigo; Marcus, Noah J.; Alcayaga Urbina, Julio Andrés
- ItemAcute Effects of Systemic Erythropoietin Injections on Carotid Body Chemosensory Activity Following Hypoxic and Hypercapnic Stimulation(2018) Andrade Andrade, David Cristóbal; Iturriaga Agüera, Rodrigo; Jeton, Florine; Alcayaga Urbina, Julio Andrés; Voituron, Nicolas; Del Rio, Rodrigo
- ItemAdenosine Triphosphate-Induced Peripheral Nerve Discharges Generated From the Cat Petrosal Ganglion in Vitro(2000) Alcayaga Urbina, Julio Andrés; Iturriaga Agüera, Rodrigo; Zapata, Patricio
- ItemCat Carotid Body Chemosensory Responses to Non-Hypoxic Stimuli Are Inhibited by Sodium Nitroprusside in Situ and in Vitro(1997) Alcayaga Urbina, Julio Andrés; Iturriaga Agüera, Rodrigo
- ItemCatecholamine Release From Isolated Sensory Neurons of Cat Petrosal Ganglia in Tissue Culture(2003) Iturriaga Agüera, Rodrigo; Zapata, Patricio; Alcayaga Urbina, Julio Andrés
- ItemChronic Intermittent Hypoxia Enhances Cat Chemosensory and Ventilatory Responses to Hypoxia(2004) Rey, S.; Alcayaga Urbina, Julio Andrés; Iturriaga Agüera, Rodrigo
- ItemChronic phenytoin treatment reduces rat carotid body chemosensory responses to acute hypoxia(2016) Alcayaga Urbina, Julio Andrés; Oyarce, María Paz; Del Rio, Rodrigo
- ItemCoherence of Chemosensory Discharges in Cats' Carotid Nerves(1996) Alcayaga Urbina, Julio Andrés; Iturriaga Agüera, Rodrigo; Zapata, Patricio
- ItemDopamine Efflux From the Carotid Body During Hypoxic Stimulation(1996) Zapata, Patricio; Iturriaga Agüera, Rodrigo; Alcayaga Urbina, Julio Andrés
- ItemDopamine Inhibits ATP-Induced Responses in the Cat Petrosal Ganglion in Vitro(2003) Alcayaga Urbina, Julio Andrés; Zapata, Patricio
- ItemDopamine Modulates Carotid Nerve Responses Induced by Acetylcholine on Cat Petrosal Ganglion in Vitro(1999) Alcayaga Urbina, Julio Andrés; Iturriaga Agüera, Rodrigo; Zapata, Patricio
- ItemEffects of CO2-HCO3- on catecholamine efflux from cat carotid body(1998) Iturriaga Agüera, Rodrigo; Alcayaga Urbina, Julio Andrés
- ItemEffects of intermittent hypoxia on cat petrosal ganglion responses induced by acetylcholine, adenosine 5 '-triphosphate and NaCN(2007) Iturriaga Agüera, Rodrigo; Alcayaga Urbina, Julio Andrés
- 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.
- ItemElectrical and pharmacological properties of petrosal ganglion neurons that innervate the carotid body(2007) Iturriaga Agüera, Rodrigo; Varas Orozco, Rodrigo; Alcayaga Urbina, Julio Andrés
- ItemElectrophysiological Characterization of Nicotinic Acetylcholine Receptors in Cat Petrosal Ganglion Neurons in Culture: Effects of Cytisine and Its Bromo Derivatives(2006) Varas Orozco, Rodrigo; Iturriaga Agüera, Rodrigo; Alcayaga Urbina, Julio Andrés
- ItemEndothelins in the Cat Petrosal Ganglion and Carotid Body: Effects and Immunolocalization(2006) Rey, S.; Alcayaga Urbina, Julio Andrés; Iturriaga Agüera, Rodrigo
- ItemIonic currents and action potential induced by electrical stimulation, ACh and ATP in petrosal ganglion neurons(2001) Varas Orozco, Rodrigo; Iturriaga Agüera, Rodrigo; Alcayaga, C.; Cerpa, V.; Alcayaga Urbina, Julio Andrés
- ItemModulatory Effect of Nitric Oxide on Acetylcholine-Induced Activation of Cat Petrosal Ganglion Neurons in Vitro(1999) Alcayaga Urbina, Julio Andrés; Iturriaga Agüera, Rodrigo
- ItemNeurotransmission in the Carotid Body: Transmitters and Modulators Between Glomus Cells and Petrosal Ganglion Nerve Terminals(2004) Iturriaga Agüera, Rodrigo; Alcayaga Urbina, Julio Andrés