Q. Can you explain Ventricular Septal Defect?
VSD can be  found in various part  of ventricular septum hence all possible views except suprasternal views are used  to detect and define the VSD. VSDs  are classified in  two ways:
A)  According  to  their location
B)  According  to  change they bring in PA pressures
Inlet VSD 
Found in between Wo AV  valves.  It is a posterior defect. AVSD  (endocardia1 cushion defect) is usbally associated with VSD  in this area when it  is called as AV  canal type VSD.  It  is usually associated with abnormal chordal attachment of TV, also known as straddling of TV.
Muscular  VSD 
Found in any part o  septum isolated or in association with other VSDs. They have high  rate of  ntaneous closure. Perimembranous and muscular VSDs can be closed by device.