Electrocardiogram in a 55-year-old woman with an endocrine disorder.


T he salient features of the electrocardiogram in Figure 1 are sinus bradycardia, low QRS voltage, flat T waves in all leads in the absence of ST-segment depression, and a long QT interval. Each of these findings is typical of hypothyroidism, and the combination of all four in the same electrocardiogram has a high positive predictive value (1, 2). Indeed… (More)

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