если у ребенка утром при перемене положения тела идет повышение чсс более чем на 35 ударов или частота пульса более 115, то это и есть причина такого субфебрилитета:
there is a common mechanism between PF and POTS, and tachycardia and hyperthermia are based on a common cause. Enhanced sympathetic response has been proposed as a mechanism of POTS among patients with PF. Oka et al. [15] suggested that the mechanism of PF was not the same as that of infection-induced fever but involved the central and sympathetic nervous systems. Signs of inflammatory reaction are not detected in blood tests of patients with PF, whereas β3 adrenoreceptor-mediated non-shivering thermogenesis is considered to play an important role in the development of enhanced hyperthermic response in patients with PF. Often, subjects with β-adrenergic hyperresponsiveness show symptoms of POTS [15, 16].
про насилие в семье как причину лихорадки не хочется думать, но вы должны и об этом знать, тем более, что такое наблюдение не единственное...
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