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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12710/20210
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dc.contributor.authorSidorenko, L.-
dc.contributor.authorTiganu, S.-
dc.date.accessioned2022-02-18T10:05:03Z-
dc.date.available2022-02-18T10:05:03Z-
dc.date.issued2012-
dc.identifier.citationSIDORENKO, L., TIGANU, S. Changes in heart rate variability influenced by hyperventilation and evoked psychoemotional states. In: MedEspera: the 4th Internat. Medical Congress for Students and Young Doctors: abstract book. Chișinău: S. n., 2012, pp. 46-47.en_US
dc.identifier.urihttp://repository.usmf.md/handle/20.500.12710/20210-
dc.description.abstractIntroduction: This study aimed to investigate ventilatory correlates of conditioned psychoemotional states - responses to fear, anxiety and restful states and heart rate variability. Respiratory, end-tidal carbon dioxide pressure (PetC02) and heart rate changes were studied in a differential fear and anxiety conditioning paradigm as well as in a restful state paradigm. We aimed to find out which kind of images, evoking a corresponding psychoemotional state, induce changes in respiration, causing hyperventilation and in heart rate variability. Medically unexplained dyspnea refers to a condition characterized by a sensation of dyspnea and is typically applied to patients presenting with anxiety and hyperventilation without underlying cardiopulmonary pathology. We were interested to know how anxiety triggers hyperventilation and elicits subjective symptoms in those patients. Using an imagery paradigm, we investigated the role of fearful imagery in provoking hyperventilation and in eliciting symptoms, specifically dyspnea and heart rate variability as well as the role of restful psychoemotional state. Methods: Twenty-eight patients with medically unexplained dyspnea matched for age and gender were exposed to scripts and asked to imagine both fearful and restful scenarios of images, while end-tidal PC 02 (PetCO,) and breathing frequency were recorded and subjective symptoms evaluated. The subject who had PetC02 falling more than 5 mmHg from baseline and persisting at this low level for more than 15 seconds in the imagination was regarded as a hyperventilation responder. Parallel was registrated cardiac activity. Results: In patients with medically unexplained dyspnea, imagination of fearful scenarios, induced anxious feelings, and provoked a significant fall in PetCO, (P<0.05). Breathing frequency tended to increase. 18 out of 28 patients were identified as hyperventilation responders compared to 8 out of 28 normal subjects without hyperventilation(P<0.01). The patients reported symptoms of dyspnea, palpitation or rapid heart beat in the same fearful script imagery. Additionally, PetCO, fall was significantly correlated with the intensity of dyspnea and palpitation experienced during the mental imagery on one hand, and with anxiety symptoms on the other. Restful scenarios of images induced also hyperventilation but in comparison fearful scenarios of images they differ qualitative. Heart rate variability changed in case of hyperventilation in correlation with restful scenarios of images. Conclusions: Fearful imagery provokes hyperventilation and induces subjective symptoms of dyspnea and palpitation in patients with medically unexplained dyspnea. Restful imagery provokes hyperventilation and induces changes in heart rate variability by increasing. The difference between the both hyperventilatory states is that in case of fearful imagery we observe tachypnoe and in case of restful imagery - hyperpnoe.en_US
dc.language.isoenen_US
dc.publisherState Medical and Pharmaceutical University Nicolae Testemitanu, Medical Students and Residents Association, Scientific Association of Students and Young Doctorsen_US
dc.relation.ispartofMedEspera: The 4th International Medical Congress for Students and Young Doctors, May 17-19, 2012, Chisinau, Republic of Moldovaen_US
dc.subjectheart rate variabilityen_US
dc.subjecthyperpnoeen_US
dc.subjectfearful script imageryen_US
dc.titleChanges in heart rate variability influenced by hyperventilation and evoked psychoemotional statesen_US
dc.typeOtheren_US
Appears in Collections:MedEspera 2012

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