Autonomic Tone Variations Prior to Onset of Paroxysmal Atrial Fibrillation.

In recent decades, autonomic changes before the onset of PAF have been observed; an increasing trend in sympathetic tone or a weakening trend vagal tone has been observed before AF, and there is increasing evidence that sympathetic nerves and the vagus nerve can initiate AF separately or in concert in regulating the electrophysiological properties of the atrium [ 8 ].

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