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.
pacemaker, cardiac pacemaker, sinoatrial node, SA node(noun) a specialized bit of heart tissue that controls the heartbeat. Cardiac pacemaker. The contraction of heart muscle in all animals with hearts is initiated by electrical impulses. The rate at which these impulses fire controls the heart rate.