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.
Pacemakers do not take over the work of the heart. After you have a pacemaker, your heart still does all its own work. Rather, the pacemaker merely helps to regulate the timing and sequence of of your heart beat. Pacemakers consist of two major parts: the generator and the leads. The generator is essentially a tiny computer (along with a battery and other electronic components), housed in a hermetically sealed titanium container.