Original Article Heart Rate Variability Analysis in Revascularized Individuals Submitted to an Anaerobic Potency Test
Geraldo Mendes Gutian Jr1, Leandro Yukio Alves Kawaguchi1,2, Alessandra de Almeida Fagundes1, Adriana Kowalesky Russo4, Emmelin Souza Monteiro1, Andrea Monteiro3, Alderico R de Paula Jr2, Wellington Ribeiro2, Rodrigo Alexis Lazo Osorio1,2.
deReabilitacao Cardiovascular da Universidade do Vale do Paraiba (Univap) (Laboratory of Cardiovascular Rehabilitation of the University of the Vale do Paraiba) 2Instituto de Pesquisa e Desenvolvimento (IP&D da Univap) Institute of Research and Development (IP&D - Univap) 3Academia Militar das Agulhas Negras (AMAN) (Agulhas Negras Military Academy) 4Universidade Federal de Sao Paulo Escola Paulistade Medicina (UNIFESP-EPM) Address for correspondence: Prof. Dr. Rodrigo Alexis Lazo Osorio, Rua Soldado Clovis Rosa da Silva, 398, Parque Novo Mundo, CEP: 02189-020 , Sao Paulo / SP, Brazil. E-mail: ralo/at/univap.br, gutianjr/at/gmail.com. Abstract The objective of this study was to analyze the behavior of autonomic modulation before, during and after the Modified Wingate Test (WanMT), throughthe analysis of Heart Rate Variability (HRV). Six volunteers between the ages of 40 and 70, post-revascularization procedures (angioplasty and/or surgery, mean duration 10 months), were submitted to supervised training for at least 10 to 14 months. The following protocol, divided into 5 phases, was used: 1) Rest Phase (RP): 180 seconds; 2) Submaximum Phase (SP): 30 seconds; 3) Maximum Phase (MP): 30seconds; 4) Active Recuperation Phase (ARP); 120 seconds and; 5) Passive Recuperation Phase (PRP): 180 seconds. For the WanMT Test, we selected the load of 3.75% of corporal weight for all volunteers. To analyze the HRV, we used the following parameters: the interval RRr, MNN, SDNN, RMSSD and PNN50. We only observed results for the group according to RMSSD parameters during the rest phase of thetest protocol in which the group remained in vagal presence and during all other phases in vagal depression. However, when we analyzed the PNN50, we observed that the group was in medium vagal presence during all of the phases of the test though there was no statistically significant difference (p> 0.05) between the phases. Therefore, we can say that all of the individuals had a similar profile inthe autonomic response to the WanMT, confirmed by the parameters studied in the analysis of the HRV in the time domain. Key Words: Autonomic modulation, Modified Wingate Test, Myocardial revascularization, Heart Rate variability Introduction The analysis of Heart Rate Variability (HRV) has become an extensively utilized Indian Pacing and Electrophysiology Journal (ISSN 0972-6292), 7(4): 225-234(2007)
Geraldo Mendes Gutian Jr, Leandro Yukio Alves Kawaguchi, Alessandra de 226 Almeida Fagundes, Adriana Kowalesky Russo, Emmelin Souza Monteiro, Andrea Monteiro, Alderico R de Paula Jr, Wellington Ribeiro, Rodrigo Alexis Lazo Osorio, “Heart Rate Variability Analysis in Revascularized Individuals Submitted to an Anaerobic Potency Test” noninvasive tool in the evaluation of cardiovascularautonomic nervous system functioning in various physiological situations1-4. The analysis of HRV in revascularized individuals has its importance since it can be used as a predictor of the evolution of cardiac disease, increasing the life expectancy of the population5. There are few studies involving HRV analysis during anaerobic exercise and the posterior behavior of the autonomic nervous system andits responses during and after physical activity. During daily activities, we observed some activities of a more intense character lasting for just a few seconds, characterizing predominantly anaerobic exercises. In this context, the study of responses to physical exercise is particularly useful, permitting an application of different levels of stress, quantifiable through the workload or the...