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.
Early Heart Pacemaker Canadian, John Hopps invented the first cardiac pacemaker. Hopps was trained as an electrical engineer at the University of Manitoba and joined the National Research Council in 1941, where he conducted research on hypothermia.his lead to Hopps' invention of the world's first cardiac pacemaker in 1950. His device was far too large to be implanted inside of the human body. It was an external pacemaker.