Does vegus nerve block or damage cause sinus tachycardia? what other symptoms does vegus nerve block cause?

Tachycardia Vagus N.: The vagus nerve is the 10th of 12 total cranial nerves. It literally wanders from your brain down your spinal column through your thorax and down to your abdomen. It is a difficult nerve to totally block. It is the nerve of the parasympathetic nervous system. It is responsible for saliva production, digestion, movement of the colon, slowing the heart, perspiration, digestion amongst other things.

Increased heart rate: The vagus nerve's (cranial nerve x) action on the heart is to slow the heart rate. There is always some resting vagus nerve activity. Therefore, blocking vagus nerve conduction causes the heart rate to increase. Heart rate may not necessarily increase enough to be categorized as "tachycradia" (rate > 100 in adults). There can be may other effects on other organs as well (esp intestines).