PMC7755490_01
(a) Electrocardiography performed at the primary care clinic showing complete atrioventricular block with supraventricular rhythm, followed by long ventricular asystole over 4.4 seconds. (b) Follow-up electrocardiography at the emergency room revealing complete AV block with ventricular escape rhythm.
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The electrocardiogram performed at the primary care clinic showed complete AV block with supraventricular rhythm, followed by long ventricular asystole over 4.4 seconds (Figure 1(a)). AV block with the ventricular escape rhythm (Figure 1(b)). A temporary transvenous ventricular pacing was applied through the internal jugular vein.
Radioiodine scan showing intense increased thyroid uptake, consistent with hyperthyroidism.
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Radioiodine scan showed intense increased thyroid uptake, consistent with hyperthyroidism (Figure 2).
8-day follow-up electrocardiography after decreasing the level of free T4 and T3 with propylthiouracil showing sinus rhythm.
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Complete AV block was recovered to sinus rhythm with rates of 75 per minute (Figure 3), and transvenous pacing lead was removed.