Resumo

ESCOBAR TINTEL, Andrés Avelino. Study of variability of cardiac frequency in patients with suspicious of autonomic failure through Holter and Poincare Diagram utilization. Rev. Nac. (Itauguá) [online]. 2024, vol.16, n.2, pp.128-144. ISSN 2072-8174.  https://doi.org/10.18004/rdn2024.may.02.128.144.

The variability of Cardiac Frequency is a valuable monitor of the autonomic function and is currently used as tool for study of changes of regularity through Holter 24 hours. From nighties, several researchers have been oriented to stablish relationship between VCF and autonomic failure, especially in patients with comorbidities, such as Hypertension, Diabetes Mellitus, atherosclerosis etc. Actually is well known that a lost or VCF or a minor variability, even in short traces of Holter in 10 minutes, means an autonomic failure, of baroreflex and quimioreflex resources. Hence, the importance of performing test of ten minutes Holter, five in decubitus position and five in standing, to patients of more than fifty years old, or less if comorbidities are presents, to design a Poincare diagram, which is special to indicate in quick view the prevalence of Sympathetic o Vagal action on cardiac frequency; that conduces to a more deep study of Autonomic failure, such tilt test, extended holter of 24 hours, and others medicals images resources.

Palavras-chave : heart rate variability; autonomic failure syndrome; autonomic neuropathy; sympathetic and parasympathetic system; Holter study; Poincare diagram.

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