<prompt> Right axis deviation is seen in all except a VSDb Tricuspid atresiac Pulmonary atresiad ASDacbcad  <response>: Normally, the QRS axis ranges from -30 to 100.An axis more negative than -30 is referred to as left axis deviation.An axis more positive than 100 is referred to as right axis deviation.Causes of left axis deviation LADLeft ventricular hypertrophyLeft anterior fascicular block or hemiblock.Inferior wall MI.Causes of Right axis deviation RADRight ventricle overload right ventricular hypertrophyLeft posterior fascicular block.Lateral wall MIDextrocardiaLeft pneumothoraxNow see the explanations of the previous question and you can easily solve this question.Left ventricular hypertrophy causes LAD, and CHDs causing LVH are : -1 VSD iii Endocardial cushion ASD v Truncus arteriosus ii PDA iv COA in older children vi Tricuspid atresiavii Pulmonary atresiaRight ventricular hypertrophy causes RAD, and CHDs causing RVH are : -TGA TAPVR TOFASD Eisenmengers syndrome COA in infants About option aAll patients with VSD are born with right ventricular hypertrophy, as the pulmonary vascular resistance decreases, RVH regresses and there is LVH. Hemodynamics of VSD will be explained in the respective question.So, at birth VSD may show right axis deviation. 