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how hole comes in heart?
A ventricular septal defect (VSD) — sometimes referred to as a hole in the heart — is a type of congenital heart defect in which there is an abnormal opening in the dividing wall between the main pumping chambers of the heart (the ventricles).The right and left-sided pumping chambers (ventricles) are separated by shared wall, called the ventricular septum.
PFO  is a term used  to describe a small “hole” in the heart between the left and right atrium. Everyone is born with this opening,which resembles a flap. In most people, the flap seals itself shortly after birth. But in others, the flap does not close completely and can open whenever
the chest is strained, such as during coughing or
sneezing. When there is a PFO, blood that has not
been cleansed by passing through the lungs can flow
through the flap, carrying debris and blood clots
through the opening and into the bloodstream.


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