The presence of left axis detion beyond -30deg in electrocardiogram suggests
Fossa ovalis ASD
Sinus venosus ASD
Ostium primum ASD
Coronary sinus ASD
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
C.V.S