Tag Archives: giant U-wave

We recorded an ECG (figure 1) in a 50-year-old Caucasian woman when she attended our clinic for atypical chest pain and a history of familial hypercholesterolaemia. Her medication included atorvastatin and ferrous sulphate only. Cardiovascular examination was unremarkable. The ECG shows a very large U-wave, but was otherwise normal. Because of the disproportionally large U-wave, she underwent extensive investigations. Her echocardiogram, exercise stress echocardiogram and 24-hour Holter monitor were all normal. Her blood tests showed normal thyroid function, normal serum potassium (4.4 mmol/L) and calcium (2.4 mmol/L). Figure 1. A 12-lead ele