Ventricular tachycardia complicating head-up tilt test: the role of coronary artery spasm.
Head-up tilt test (HUT) is frequently used for diagnosis of neurocardiogenic syncope. It mimics orthostatic stress resulting in venous pooling, central hypovolemia with compensated left ventricular hypercontraction, and sympathetic stimulation. Although generally considered to be a safe procedure, we hereby present a rare complication of HUT in a 50-year-old woman with isoproterenol infusion inducing coronary spasm that resulted in ventricular tachycardia.
Yiu
Kai-Hang
KH
Division of Cardiology, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong.
Tse
Hung-Fat
HF
Lau
Chu-Pak
CP
D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use; D001241:Aspirin / Q000627:therapeutic use; D002121:Calcium Channel Blockers / Q000627:therapeutic use; D016887:Cardiopulmonary Resuscitation; D002316:Cardiotonic Agents / Q000009:adverse effects; D003329:Coronary Vasospasm / Q000139:chemically induced / Q000150:complications* / Q000503:physiopathology; D004359:Drug Therapy, Combination; D004562:Electrocardiography; D005260:Female; D006801:Humans; D007545:Isoproterenol / Q000009:adverse effects; D008875:Middle Aged; D009566:Nitrates / Q000627:therapeutic use; D013575:Syncope / Q000175:diagnosis; D017180:Tachycardia, Ventricular / Q000188:drug therapy / Q000209:etiology*; D018667:Tilt-Table Test / Q000009:adverse effects* / Q000379:methods; D016896:Treatment Outcome; D019210:Troponin I / Q000097:blood
D000889:Anti-Arrhythmia Agents; D002121:Calcium Channel Blockers; D002316:Cardiotonic Agents; D009566:Nitrates; D019210:Troponin I; D007545:Isoproterenol; D001241:Aspirin