If cardiac supply of vagus nerve is cut, then

If the cardiac supply of the vagus nerve is cut, it would have significant effects on the heart. The vagus nerve plays a crucial role in the parasympathetic nervous system, which is responsible for the 'rest and digest' functions of the body.

1. Increased Heart Rate: The vagus nerve helps to control the heart rate. When it is stimulated, it causes the heart rate to slow down. Therefore, if the cardiac supply to the vagus nerve is cut, it would result in an increased heart rate, a condition known as tachycardia.

2. Irregular Heart Rhythms: The vagus nerve also helps to control the rhythm of the heart. If its supply is cut, it could potentially lead to irregular heart rhythms, or arrhythmias.

3. Potential for Heart Damage: Over time, if the heart is consistently beating at a high rate, it could potentially lead to heart damage. This is because the heart is having to work harder to pump blood around the body.

4. Other Effects: The vagus nerve also has other functions in the body, such as controlling the muscles in the gut to help with digestion. Therefore, cutting its supply could potentially have other effects on the body as well.

It's important to note that this is a hypothetical scenario and cutting the cardiac supply of the vagus nerve would be a serious medical procedure with significant risks.