Cardiac Amyloidosis Presenting as Recurrent Syncope.
Cardiac amyloidosis is an uncommon disease that is rarely diagnosed clinically. In this study, we present a case of a 63-year-old man with recurrent syncope and elevated troponin I levels. The patient's coronary angiography showed no significant stenosis. An implantable cardioverter-defibrillator was implanted into the patient due to episodes of ventricular tachycardia. The diagnosis of cardiac amyloidosis was made by endomyocardial biopsy. The patient died of a combination of cardiogenic shock and rapid deterioration of renal function. Although cardiac amyloidosis is rarely diagnosed, it should be considered as a differential diagnosis in patients with recurrent syncope, because it is potentially treatable.


BACKGROUND
Cardiac amyloidosis; Syncope; Troponin I; Ventricular tachycardia.
Division of Cardiology, Department of Internal Medicine, Mackay Memorial Hospital, Taipei, Taiwan;
Min-I
MI
Su
Division of Cardiology, Department of Internal Medicine, Mackay Memorial Hospital, Taipei, Taiwan;
Jui-Peng
JP
Tsai
Division of Cardiology, Department of Internal Medicine, Mackay Memorial Hospital, Taipei, Taiwan; ; Mackay Junior College of Medicine, Nursing, and Management, Taipei, Taiwan.
Sheng-Hsiung
SH
Chang
Division of Cardiology, Department of Internal Medicine, Mackay Memorial Hospital, Taipei, Taiwan;
Cheng-Huang
CH
Su