The presence of left axis detion beyond -30deg in electrocardiogram suggests
High-Yield Explanation
The electrocardiogram of ostium secundum ASD is characterized by right axis detion and right ventricular hyperophy. The characteristic configuration of the lead Vl is rsR&; seen in almost 90% patients. Presence of left axis detion beyond -30deg suggests ostium primum ASD. Reference: Essential Paediatrics; O.P. Ghai; Page no: 413