If our homes aren't ventilated, they become stagnant breeding grounds for germs and impurities. Similarly, if we visualize qi (ki / chi) coursing around and through our bodies, we can understand how this force needs both an
entrance point and an escape valve. A main entrance is the medulla
oblongata, and two main exit points lie in the center of our palms. The spot on each palm is called Laogong, or Palace of Anxiety, and it's associated with outflowing ki energy from the heart, whose protection is a main duty of the pericardium. Laogong, point number 8 on the Pericardium line, also goes by the name Labor Palace.
It is surmised that too much ki energy building up in the protective
pericardium can lead to heart disease.