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Updated: Jul 14, 2026
06:43
Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management
Published on: November 21, 2017
[Hyperthermia and hypothermia. Effects on the cardiovascular system]
1Institut für Physiologie, Medizinische Fakultät Carl Gustav Carus, TU Dresden, Fetscherstr. 74, 01307 Dresden. Andreas.Deussen@tu-dresden.de
Der Anaesthesist
|June 8, 2007
Summary
Body temperature extremes significantly impact the cardiovascular system. Heat causes increased cardiac output and skin blood flow, while cold triggers vasoconstriction, affecting blood pressure.
Area of Science:
- Cardiovascular physiology
- Environmental thermoregulation
Context:
- Environmental heat and cold profoundly influence cardiovascular function.
- Thermoregulatory mechanisms involve complex autonomic nervous system responses.
- Age and comorbidities like diabetes can impair circulatory adaptation to thermal stress.
Purpose:
- To elucidate the cardiovascular responses to hyperthermia and hypothermia.
- To investigate the physiological mechanisms, including autonomic and nitric oxide pathways, mediating circulatory adjustments.
- To examine how risk factors and anesthesia affect these regulatory processes.
Summary:
- Hyperthermia (elevated core temperature) increases cardiac output and skin blood flow via sympathetic nervous system modulation, including cholinergic and nitric oxide pathways.
- Hypothermia (reduced core temperature) induces reflex adrenergic vasoconstriction, leading to decreased cardiac output and potential blood pressure increases, especially in older adults.
- Circulatory adaptations to thermal stress are compromised in individuals with risk factors and during anesthesia.
Impact:
- Provides insights into the physiological basis of heat and cold-related cardiovascular risks.
- Highlights the vulnerability of specific populations (elderly, diabetics, anesthetized patients) to thermal challenges.
- Informs clinical strategies for managing cardiovascular health in extreme environmental conditions.
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