Both the SA node and the AV node naturally slow with ... In these cases, slow rates are treatable without a pacemaker. A ...
The rhythm of the heart is directed by the "pacemaker" of the heart called the sinoatrial (SA) node. The SA node generates an electrical impulse that causes the upper heart chambers (atria ...
Sick sinus syndrome is the leading indication for permanent pacemaker implantation ... On rare occasions, ischemia to the SA node or other infiltrative disease can cause SSS.