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This study investigated whether depression and anxiety symptoms are associated with measures of autonomic nervous system dysfunction in patients with implantable cardioverter defibrillators who are at high risk of cardiac rhythm disturbances. Depression and anxiety are associated with autonomic nervous system dysfunction, which may promote the risk of malignant cardiac arrhythmias.

Association Between Symptoms of Depression and Anxiety With Heart Rate Variability in Patients With Implantable Cardioverter Defibrillators