Autonomic dysfunction in patients with chronic cerebral ischemia
Various autonomic nervous system (ANS) disorders exist in 25-80% of the general population. Seniors affected by chronic cerebral ischemia (CCI) are subject to the development of autonomic disorders. Purpose: to carry out the analysis of autonomic dysfunction in subjects with CCI. Material and Methods. Autonomic status was evaluated using autonomic function tests. All patients underwent cardiointervalography. Heart rhythm variability was estimated by mode, amplitude, variation range, power of waves of various frequency, coefficient of vagosympathetic balance etc. as measured by "Rhythm-MET" system. One hundred fifty one patients aged 48-93 years were examined and distributed to three groups depending on the degree of severity of CCI. Results were statistically processed using Statistica 6 software. Results. Patients with CCI had differences in autonomic function parameters which had multidirectional character and were dependent on sympathetic-parasympathetic balance and CCI stage. The obtained data demonstrate that prevalence of sympathetic influence was observed in 52.8% patients with I grade CCI, in 64.8% patients with II grade CCI and prevalence of parasympathetic