Hans Holdhaus can assess patients' stress levels by measuring their heart rate variability. A healthy heart speeds up with stress. Photo: Felix Wong Hans Holdhaus can assess patients' stress levels by measuring their heart rate variability. A healthy heart speeds up with stress. Photo: Felix Wong
Hans Holdhaus can assess patients' stress levels by measuring their heart rate variability. A healthy heart speeds up with stress. Photo: Felix Wong

Fire in my belly

Hans Holdhaus can assess patients' stress levels by measuring their heart rate variability. A healthy heart speeds up with stress. Photo: Felix Wong Hans Holdhaus can assess patients' stress levels by measuring their heart rate variability. A healthy heart speeds up with stress. Photo: Felix Wong
Hans Holdhaus can assess patients' stress levels by measuring their heart rate variability. A healthy heart speeds up with stress. Photo: Felix Wong
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