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.
The role of VVI pacemaker is that in the event that a heart is slowing down, or stop, sends an electrical impulse to the right ventricle and activates the heart.Electrical impulses from the right ventricle passes to the left ventricle and thereby runs the blood flow.VI pacemaker is not sufficient when the ventricles are not able to beat together in the cases of congestive cardiac failure and then dual chamber pacemaker is required. Possible problems during implementation of VVI pacemakers are: 1  collapsed lung. 2  infection. 3  pericarditis. 4  air embolism.