<prompt> In syndrome X, patients have all of the following except-Angina like chest painIschemic ST segment depressionAbnormal coronary aeriogramExcellent prognosis choice in  <response>: Cardiac syndrome X CSX is typical anginalike chest pain with evidence of myocardial ischemia in the absence of flow-limiting stenosis on coronary angiography. Cannon et al termed this entity, characterized by a decrease in coronary flow reserve without epicardial aery stenosis, microvascular angina. Ref Harrison 20th edition pg 1435 