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Recurrent syncope
| The first 150 words of the full text of this article appear below. |
His admission ECG (fig 1
in questions) shows sinus rhythm, a major prolongation of the QTc interval (660 ms in S2), and a 2/1 atrioventricular block.
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[in a new window] Figure 1 Lead S2 of the ECG obtained at day 6 under ß block.
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The diagnosis is long QT syndrome (LQTS) complicated by 2/1 atrioventricular block.
The differential diagnosis includes congenital and acquired long QT syndrome. Information about medication taken is critical for the diagnosis of drug induced QT prolongation. QT prolongation in the course of other diseases (electrolyte disturbances, myocardial dysfunction, neurological conditions...) should also be excluded by history, physical examination, laboratory and imaging studies (blood analysis, echocardiography...). In this case, no acquired causes of QT prolongation was shown or suspected. A family history of sudden death at a young age, a family or personal history of deafness, and QT prolongation on the ECG of the patient relatives commonly lead to the proper diagnosis of
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