Life Threatening Broad QRS Tachycardia in an Infant with Conduction Disorder and SCN5A Mutation

We present the case of an infant admitted to our department for a rapid broad complex tachycardia and cardi-ovascular collapse. The patient was submitted to genetic testing because of a conduction defect at baseline ECG and family history of gene mutation. A new SCN5A gene mutation variant was found leading to diagnosis of sodium-channel dysfunction arrhythmia.