Acute response to aerobic exercise on autonomic cardiac control of patients in phase iii of a cardiovascular rehabilitation program following coronary artery bypass grafting
Rev. bras. cir. cardiovasc
;
34(3): 305-310, Jun. 2019. tab, graf
Artículo
en Inglés
| LILACS
| ID: biblio-1013457
ABSTRACT
Abstract Objective:
The aim of the present study was to investigate the acute response to aerobic exercise on autonomic cardiac control of patients undergoing coronary artery bypass grafting (CABG).Methods:
The study sample consisted of eight patients (age 58.6±7.7 years; body mass index 26.7±3.5 kg.m2) who underwent a successful CABG (no complications during surgery and/or in the following weeks). To assess heart rate variability (HRV), participants remained in a supine position with a 30-degree head elevation for 20 minutes. Electrocardiographic signal (protocol with three derivations) was collected from 600 Hz sample rate to obtain beat-to-beat intervals (R-R interval). This assessment was performed before, after one hour and after 24 hours of the exercise session. All patients underwent a 35 minutes aerobic exercise session (AES) (low-moderate intensity) on the cycle ergometer.Results:
Significant differences were found in the time domain, with positive changes in root mean square of successive RR interval differences (rMSSD) (ms) (parasympathetic component) (one [P=0.017] and 24 hours [P=0.007] post-session). In the frequency domain, we found a significant difference in high frequency (HF) (ms2) (parasympathetic component) (one hour [P=0.048] post-session). The low frequency (LF)/HF ratio (sympathetic and parasympathetic components with a predominance of the sympathetic component) reached statistical significance only 24 hours (P=0.018) post-session. Additionally, the largest effect size was observed only for the LF/HF ratio at one (d=-0.8) and 24 hours (d=-1.3) after one AES.Conclusion:
The practice of (acute) aerobic exercise improved autonomic cardiac control in patients undergoing CABG.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Sistema Nervioso Autónomo
/
Ejercicio Físico
/
Puente de Arteria Coronaria
/
Terapia por Ejercicio
/
Rehabilitación Cardiaca
/
Frecuencia Cardíaca
Tipo de estudio:
Estudios de evaluación
/
Guía de Práctica Clínica
Límite:
Anciano
/
Femenino
/
Humanos
/
Masculino
Idioma:
Inglés
Revista:
Rev. bras. cir. cardiovasc
Asunto de la revista:
Cardiología
/
Cirugía General
Año:
2019
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Universidade Ceuma/BR
/
Universidade Federal do Maranhão/BR
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