It depdends: There are many causes of toe spasms/cramps and it is important to identify the source. Cramps and spasms can be due to dehydration and low potassium. But they can also be due to a nerve conditions as well. I recommend you see a specialist for further evaluation. ...Read more.
1 The SA node (called the pacemaker of the heart) sends out an electrical impulse. 2  The upper heart chambers (atria) contract. 3  The AV node sends an impulse into the ventricles.  The lower heart chambers (ventricles) contract or pump.
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.