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Pedigree drawing of the family-3 and 4 with autosomal recessive LQTS2. ECG of the proband from family-4 is shown below the pedigree drawing, which shows sinus tachycardia, almost complete AV block, wide complex escape rhythm with very long QTc intervals (QT >600 ms). Mutation, c.3208 C > T (p.Q1070X) in the KCNH2 gene was found in the patients (shown on the right), marked with an arrow.
