freqüência cardíaca máxima em testes de exercício em esteira rolante e em cicloergômetro de membros inferiores maximal heart rate in exercise tests on treadmill and in a cycloergometer of lower limbs
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2005
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Abstract
OBJETIVO: Comparar, retrospectivamente, os valores de freqüência cardíaca máxima (FCM) e o descenso da freqüência cardíaca no primeiro minuto da recuperação (dFC), obtidos em teste de exercício (TE) realizados em dois ergômetros e momentos distintos. MÉTODOS: Sessenta indivíduos (29 a 80 anos de idade), submetidos a TE cardiopulmonar em ciclo de membros inferiores (CMI) em nosso laboratório e que possuíam TE prévio (até 36 meses) em esteira (EST) em outros laboratórios, nas condições idênticas de medicações de ação cronotrópica negativa. RESULTADOS: FCM foi semelhante no CMI: 156±3 e EST: 154±2 bpm (p=0,125), enquanto o dFC foi maior em CMI: 33±2, EST: 26±3 bpm (média ± erro padrão da média) (p<0,001). Nas variáveis hemodinâmicas estudadas, a pressão arterial sistólica e o duplo produto foram maiores no TE-CMI (p<0,001). O eletrocardiograma (ECG) foi semelhante nos dois TEs, exceto por arritmias supraventriculares mais freqüentes no CMI. CONCLUSÃO: a) É possível, com empenho do examinador e conhecimento prévio do resultado de FCM em um TE anterior, obter níveis altos de FCM em um TE-CMI; b) interromper o TE baseado em FCM prevista por equações tende a levar a esforços submáximos; c) o dFC difere nas recuperações ativa e passiva; d) novas formas de analisar o comportamento da FC no exercício, que não apenas o valor da FCM, são necessárias para caracterizar um TE como máximo.
OBJECTIVE: To compare, retrospectively, the values of maximum heart rate (MHR) and the decrease of the heart rate at the first minute of recovery, which were obtained in an exercise test (ET) performed in two different ergometers and at different moments. METHODS: Sixty individuals (from 29 to 80 years old), submitted to cardiopulmonary ET in a cycle of lower limbs (CLL) in our laboratory and who had previous ET (up to 36 months) in a treadmill (TRM) in other laboratories, under identical conditions of medications of negative chronotropic action. RESULTS: MHR was similar in CLL: 156±3 and TRM: 154±2 bpm (p=0.125), whereas dHR was higher in CLL: 33±2, EST: 26±3 bpm (mean ± standard error of the mean) (p<0.001). In hemodynamic variables studied, the systolic blood pressure and the double product were higher in the ET-CLL (p<0.001). The electrocardiogram (ECG) was similar in both ETs, except due to more frequent supraventricular arrhythmias in CLL. CONCLUSION: a) With some diligence from the examiner and previous knowledge of MHR in a previous ET it is possible to obtain high levels of MHR in an ET-CLL; b) interrupting the MHR-based ET forecast through equations tends to lead to sub-maximum efforts; c) dHR differs in active and passive recoveries; d) new ways to analyze the HR behavior under exercise, which is not only the value of MHR, are necessary to characterize an ET as maximum.
OBJECTIVE: To compare, retrospectively, the values of maximum heart rate (MHR) and the decrease of the heart rate at the first minute of recovery, which were obtained in an exercise test (ET) performed in two different ergometers and at different moments. METHODS: Sixty individuals (from 29 to 80 years old), submitted to cardiopulmonary ET in a cycle of lower limbs (CLL) in our laboratory and who had previous ET (up to 36 months) in a treadmill (TRM) in other laboratories, under identical conditions of medications of negative chronotropic action. RESULTS: MHR was similar in CLL: 156±3 and TRM: 154±2 bpm (p=0.125), whereas dHR was higher in CLL: 33±2, EST: 26±3 bpm (mean ± standard error of the mean) (p<0.001). In hemodynamic variables studied, the systolic blood pressure and the double product were higher in the ET-CLL (p<0.001). The electrocardiogram (ECG) was similar in both ETs, except due to more frequent supraventricular arrhythmias in CLL. CONCLUSION: a) With some diligence from the examiner and previous knowledge of MHR in a previous ET it is possible to obtain high levels of MHR in an ET-CLL; b) interrupting the MHR-based ET forecast through equations tends to lead to sub-maximum efforts; c) dHR differs in active and passive recoveries; d) new ways to analyze the HR behavior under exercise, which is not only the value of MHR, are necessary to characterize an ET as maximum.
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| Reference Key |
arajo2005arquivosfreqncia
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| Authors | ;Claudio Gil Soares de Araújo;Vivian Liane Mattos Pinto |
| Journal | revista cubana de ciencias informáticas |
| Year | 2005 |
| DOI |
10.1590/S0066-782X2005001400009
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| URL | |
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