![]() Our study demonstrated the practical feasibility of cardiac coherence biofeedback training in CAD patients. However, we observed a significant increase of the percentage of cardiac coherence, in relation with an increased SDNN index. The small sample size precludes any firm conclusions concerning the effect of cardiac coherence biofeedback on physiological or psychological variables. Statistical comparisons assessed the inter and intra group differences. Physiological variables (systolic and diastolic blood pressure, SDNN) and psychosocial variables (anxiety, depression, type D personality) were measured at the start and at the end of the programme in both groups. The control group participated in the usual cardiac rehabilitation programme only. ![]() ![]() The experimental group participated in a programme of 10 sessions of cardiac coherence biofeedback training, in addition to the rehabilitation programme. In this randomised and controlled study, 31 CAD patients were randomly assigned to an experimental or to a control group. The purpose of this study was to investigate the practical feasibility and the psychophysiological effects of biofeedback applied to heart rate variability (HRV biofeedback) in order to increase cardiac coherence in coronary artery disease (CAD) patients participating in a cardiac rehabilitation programme. It has been applied to patients with various cardiovascular disorders. Biofeedback is a self-regulation therapy by which the patient learns how to optimize the functioning of his autonomic nervous system.
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