I have done a fair search into this cardiac syndrome X and it describes the chest pain and test results of RSD of the heart!
Tests results such as ichemic areas showing up on a chemical heart stress test (MIBI), yeat no blockages of the arterys showing up on an angiogram, and abnormal ST levels on ECG's. I think this CSX is infact RSD of the heart and I think the hypothesis proposed makes alot of sence.
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This hypothesis proposes that lateral medullary ischaemia at a microvascular level is responsible for these syndromes and could also be linked to other conditions where autonomic dysfunction is a major feature such as late-onset asthma, type 2 diabetes and essential hypertension. Autonomic function is controlled by the nucleus tractus solitarius, which acts as the main viscero-afferent nucleus in the brain stem regulating vagal tone. It is particularly susceptible to ischaemia since it is highly metabolically active and lies in a medullary arterial watershed zone.
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Irritable bowel syndrome, same thing diffrent area.. also endemetreosis (sp?) all caused I think by microvascular ischemia, RSD same thing, I believe it starts with the swelling of the injured area doing the damage to cells and to the small nerve fibers ect ect..