Cardiovascular dynamics in blood phobia: Evidence for a key role of sympathetic activity in vulnerability to syncope
| Autor: | Giulia Buodo, Daniela Palomba, Marianna Munafò, Michela Sarlo, Luciano Stegagno |
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| Rok vydání: | 2008 |
| Předmět: |
Adult
medicine.medical_specialty Cardiac output Sympathetic nervous system Sympathetic Nervous System Cognitive Neuroscience Emotions Parasympathetic nervous system Hemodynamics Experimental and Cognitive Psychology Baroreflex Syncope Electrocardiography Young Adult Developmental Neuroscience Internal medicine mental disorders Heart rate Blood-injection-injury phobia Hemodynamic measures Disgust medicine Humans Vagal tone Biological Psychiatry Endocrine and Autonomic Systems General Neuroscience Blood phobia Arrhythmias Cardiac medicine.disease Blood Neuropsychology and Physiological Psychology Blood pressure medicine.anatomical_structure Phobic Disorders Social Perception Neurology Data Interpretation Statistical Cardiology Female Psychology Photic Stimulation |
| Zdroj: | Psychophysiology. 45:1038-1045 |
| ISSN: | 1469-8986 0048-5772 |
| Popis: | This study was aimed at clarifying the mechanism predisposing people with blood phobia to syncope by investigating the complete hemodynamic response pattern and the underlying autonomic control. Blood phobics and controls were shown 3 film-clips: phobia-related, phobia-unrelated, and neutral. Hemodynamic responses were recorded using impedance cardiography and Finapres. Preejection period and respiratory sinus arrhythmia were employed as indices of cardiac sympathetic and parasympathetic activity. Self-ratings of emotion were also collected. Blood phobics displayed global heart rate and cardiac output increases to the phobic film, mediated by augmented cardiac sympathetic activity. Systolic blood pressure and total peripheral resistance markedly declined, with no evidence of diphasic reaction or parasympathetic activation. An impaired vasomotor response under sympathetic control might be the key mechanism underlying the phobic dysfunctional response. |
| Databáze: | OpenAIRE |
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