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Representative tracings of mean skin temperature (Tsk), internal temperature (Tcore), heart rate (HR), mean arterial blood pressure (MAP) and muscle sympathetic nerve activity (MSNA) during whole body heating in a CHF patient (top) and a young healthy control subject (bottom). Mild heating: Tsk > ~36°C, while ΔTcore <0.3°C. Heat stress: ΔTcore >0.5°C when Tsk was ~38°C.
