It is associated with dipyridamole. Hence, dipyridamole is a pharmacological success diagnostically, but a therapeutic failure because of the<unk>  phenomenon.<unk>  is also the mechanism in most drug-based cardiac stress tests; When a patient is incapable of doing physical activity they are given a vasodilator that produces a "cardiac<unk>  syndrome" as a diagnostic procedure. The test result is positive if the patient's symptoms reappear or if ECG alterations are seen. Hydralazine can potentially cause this condition as well, as it is a direct arteriolar vasodilator. It has been associated with nitroprusside. Other causes<unk>  arteriovenous fistula between<unk>  artery and another cardiac chamber, like, the<unk>  sinus, right atrium, or right ventricle may cause<unk>  syndrome under conditions like myocardial infarction and possible angina or ventricular arrhythmias, if the shunt is large in magnitude. It can also be associated with new patterns of blood vessel growth.
Coronary steal
Coronary occlusion
Myocardial stunning
Hibernating myocardium
Anemic infarct
Warfarin necrosis
Coronary thrombosis
Coronary vasospasm