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Title: Electrocardiographical case. J wave and presyncope in a middle-aged woman
Authors: Namboodiri, N.
Bohora, S.
Dora, S. K.
Tharakan, J. A.
Keywords: Cardiology
Issue Date: 2008
Citation: SINGAPORE MEDICAL JOURNAL. 49; 2; 160-163
Abstract: A 46-year-old woman presented with three episodes of presyncope in the previous two days. Electrocardiogram (ECG) showed sinus rhythm, relatively short QT interval (QTc of 340 msec) and prominent J-waves in the inferior leads. Biochemical evaluation revealed serum calcium of 17.4 mg/dL, phosphorus of 2.3 mg/dL and alkaline phosphatase of 533 IU/ml. She was managed with saline diuresis followed by elective parathyroidectomy. ECG became normal with the disappearance of J-waves after correction of hypercalcaemia. She was asymptomatic at six months of follow-up. The presence of J-waves (Osborne waves) in hypercalcaemia has rarely been reported.
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