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Aim
This study examined the total peripheral vascular resistance (TPVR) and cardiac output changes due to the head‐up tilt test (HUTT) in children with vasovagal syncope (VVS).
Methods
From December 2013 to January 2016, we recruited 77 children diagnosed with VVS group at Peking University First Hospital, China, and 28 children without VVS provided the control group. Heart rate, blood pressure,...
Postural tachycardia syndrome (POTS) is characterized by symptoms of orthostatic intolerance. Antibodies of acetylcholine receptor (AChR-ab) affect acetylcholine transmission between the ganglia and result in imbalance of the autonomic nervous system in POTS. This study was designed to analyze the clinical characteristics of POTS patients with AChR-ab positive and explore the value of AChR-ab in children...
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