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.
Directly before the bundle of His in the electrophysiological pathway of the heart is the atrioventricular (AV) node. Together, they make up the area of the heart called the AV junction. The AV node contains only myocardial cells, no pacemaker cells. The bundle of His connects the AV node to the left and right bundle branches that control the contraction of the ventricles. The pacemaker cells within in the bundle can send electrical pulses at an accelerated rate of 40 to 60 beats per minute.