That would be a medical professional.
The conduction that is blocked/delayed along the cardiac path during a heart block would be the pathway from the SA node to the AV node.
Social anxiety disorder is interesting, I have it, its a common one in teens.
I believe it is in the carbohydrate group, <span>polysaccharide if you will.</span>
I would go for, Eating a well-balanced diet to increase energy and immunity.