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  • Title: A novel mutation (Arg169Gln) of the cardiac ryanodine receptor gene causing exercise-induced bidirectional ventricular tachycardia.
    Author: Hsueh CH, Weng YC, Chen CY, Lin TK, Lin YH, Lai LP, Lin JL.
    Journal: Int J Cardiol; 2006 Apr 04; 108(2):276-8. PubMed ID: 16517285.
    Abstract:
    An 18-year-old woman presented with exercise induced sudden collapse. Series of cardiac work up revealed no structural cardiac abnormalities. Bidirectional ventricular tachycardia occurred during a treadmill exercise test. Under the impression of catecholaminergic polymorphic ventricular tachycardia, we screened the cardiac ryanodine receptor gene for mutation. We identified a novel heterozygous mutation at the 169th amino acid (Arg169Gln). This amino acid is highly conserved among many species and this mutation was not present in 50 normal control subjects. This patient was treated with a beta-block with good response.
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