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[Update on coronary syndrome X]
I Iglesias1, S Velasco, E Alegría
1Departamento de Cardiología y Cirugía Cardiovascular, Facultad de Medicina, Universidad de Navarra, Pamplona.
Insights
Syndrome X, characterized by chest pain and normal coronary arteries, may stem from reduced blood vessel dilation. Some patients risk heart muscle enlargement, and effective treatments are currently lacking.
Area of Science:
- Cardiology
- Internal Medicine
Context:
- Syndrome X lacks a precise clinical definition.
- Patients present with effort angina and normal coronary arteries.
- Exclusion of other chest pain causes is critical.
Purpose:
- To define the characteristics of Syndrome X.
- To explore potential pathophysiologic mechanisms.
- To outline the prognosis and identify risk factors.
Summary:
- Syndrome X involves chest pain with normal coronary arteries, possibly due to impaired vasodilation.
- Prognosis is generally favorable.
- A subset with left bundle branch block may develop dilated cardiomyopathy.
Impact:
- Highlights the need for further research into Syndrome X.
- Underscores the current lack of effective therapeutic options.
- Identifies a specific subgroup at risk for adverse cardiac events.
Abstract:
Syndrome X is not a well-defined clinical entity. Patients included are those with typical effort angina with angiographically normal coronary arteries and with no evidence of other causes of chest pain. The pathophysiologic mechanisms involved in this syndrome could be a reduced vasodilatory capacity. The prognosis is usually good, but a subgroup of patients with left bundle brunch block in the ECG may develop a dilated cardiomyopathy. To present it lacks a full effective treatment.