Answer:
The correct answer would be - his heart must be racing fast and pain an uneasiness.
Explanation:
Cardiac rhythm in normal state is normal. Sinus rhythm with PAC is a condition that causes an individual to increase the heart are four-time faster than the normal heartbeat. PACs disturbs the normal rhythm of the sinus by internalizing the extra beat in it.
The PACs are electrical impulses generated within the cardiac atria instead of the sinus node.
Thus, the correct answer is - his heart must be racing fast and pain an uneasiness.