
Heart block is the disease of cardiovascular electrical system, which controls the rhythm and rate of the heart. Heart block mainly occurs due to disturbed and slowed electrical signals across the heart. Heart block is categorized in two types on the basis of working of the cardiovascular electric signals; partial heart blocks and complete heart blocks. In the partial heart blocks, the cardiovascular electrical signals are partially blocked i.e., their influx to heart is delayed. In the complete heart blocks, the signals transmission is blocked completely. The heart blocks are also classified on the basis of severity as, first-degree heart blocks, second-degree heart blocks and third-degree heart blocks. In the first-degree heart blocks, the electrical signals slows down across the pathway from atrium (the upper chamber of the heart) to the ventricle (the lower chamber of the heart). The treatment of the heart blocks depend mainly on the type of the heart block an individual is suffering from. Treatment is not essential for the first-degree heart blocks. However, in the second-degree heart blocks, pacemakers are placed over the skin chest or abdomen by cardiologists. Adoption of pacemakers is also implemented in the third-degree heart blocks.