Provide Details Of Dravet Syndrome SMEI

hello dr.praveen , how are you , im majed and i would like to ask you certain questions about dravet syndrome SMEI (Severe Myoclonic Epilepsy of Infancy -is it a genetic disorder? if it is? is it transmitted from fathers or mothers? and if it is , does this mean that all coming childs will have the disorder or it can be that 1 or more of childs free from the disoder? -Does is it have poor prognosis? if it is ,, what is the leading cause of death? -does diet can affect the course of the disease? thanx alot