“Is autonomic nervous system dysfunction a trigger or a secondary factor caused by the disease?” That is one of the most important questions that the authors of that book are asking and trying to find an answer to. The sympathetic and parasympathetic systems are not counterparts of the autonomic nervous system; they act in various combinations. For example, in tachycardia, normally we assume that sympathetic activity is high and parasympathetic activity is low. But we can observe six different a ...