Dreams that involve hair loss or the loss of teeth, false teeth, etc, are normally a sign that you're worried about either aging, or - more frequently - the passage of time, that life is passing you by in some way.<br /> <br /> I don't think you can analyse dreams precisely.
SA node. the main pacemaker that initiates each heart beat located at the junction of the superior vena cava and the right atrium the SA node generates electrical impulses at 60 to 100 times per minute and is controlled by the sympathetic and parasympathetic nervous system.
A heartbeat is caused by an electrical impulse traveling through the heart. The heart's built-in electrical system controls the speed of its pumping. The electrical impulse originates in the sinus node which functions as the heart's natural pacemaker. The sinus node is most often located in the top of the right atrium. The electrical signals travel through the heart tissue causing the atria and ventricles to contract and relax and the blood to be pumped to the body.