“…However, many authors have described the autonomic hyperactivity as consistent with the sympathetic division alone (2, 3). Lately, cases of PAH have been separated into two categories: those consisting of paroxysmal sympathetic hyperactivity in the absence of parasympathetic features and those involving a combination of sympathetic and parasympathetic hyperactivity, termed mixed autonomic hyperactivity disorders (MAHD) (4, 5). MAHD is clinically diagnosed based on the combined presence of sympathetic hyperactivity (increased heart rate (HR), respiratory rate (RR), blood pressure (BP) and body temperature (BT), sweating and papillary dilatation) and parasympathetic hyperactivity (decreased HR, RR, BP and BT, piloerection, flushing, papillary contraction, hiccups, lacrimation, yawning, and sighing) (6).…”