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Endothelin: An Important Mediator in the Pathophysiology of Syndrome X?

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Part of the book series: Developments in Cardiovascular Medicine ((DICM,volume 213))

Abstract

Angina pectoris with normal coronary arteries is a common clinical entity with up to 30% of patients undergoing invasive assessment for anginal chest pain having normal coronary angiograms [1,2]. The term cardiac syndrome X to describe patients with chest pain and normal coronaries was first introduced by Kemp in 1973 [3] and is now generally confined to patients with exertional angina, completely normal coronary angiograms and a positive electrocardiographic response (> 0.1 mV of ST segment depression) to exercise testing [4]. The pathophysiology of chest pain in this patient group appears to be heterogeneous and remains the subject of considerable debate [57]. A non-cardiac source of pain, often originating in the gastrointestinal or musculoskeletal system, may be identified by further investigation. However, around 20% of patients appear to have objective evidence of myocardial ischemia in most series, and a mechanism involving a primary cardiac abnormality remains the most likely explanation for the symptoms in this subgroup.

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Cox, I.D., Kaski, J.C. (1999). Endothelin: An Important Mediator in the Pathophysiology of Syndrome X?. In: Kaski, J.C. (eds) Chest Pain with Normal Coronary Angiograms: Pathogenesis, Diagnosis and Management. Developments in Cardiovascular Medicine, vol 213. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-5181-2_9

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