What is the effect on the heart rate if the parasympathetic nerve is cut in a rabbit?

$A$: The resting heart rate,about $75$ beats/minute,is usually lower than the autorhythmic rate of the $SA$ node ($90-100$ beats/minute).
$R$: At rest,the parasympathetic nervous system effects dominate the heart rate.

Innervation of heart in the intact animals is primarily meant for

Heart is innervated by

What happens to the heart rate if the parasympathetic nerve of a rabbit is cut?

The heart's normal activities are regulated: