Increases the workload of the heart, so long term, chronic can cause significant heart problems (damage to lining of arteries, resulting in atherosclerosis, increased risk of CHD and stoke) Lack of regular exercise, a high salt diet, obesity, chronic stress, family history, gender and race are risk factors.
Bradycardia is the medical term used for a low heart rate. Low pulse rates can be caused by metabolic diseases and damage to the heart structure. An imbalance in electrolytes and some medications can also cause your pulse to drop.
1 These medicines can slow your heartbeat too much.  You faint or have other symptoms of a slow heartbeat. For example, this may happen if the main artery in your neck that supplies your brain with blood is sensitive to pressure. Just quickly turning your neck can cause your heart to beat slower than normal.