What does it mean when you have conscious control of your heart rate? i can and have been able to increase my heart rate at will for as long as i can remember.

This : This is actually a normal phenomenon. We are able to control our heart rates by doing simple things. You just happen to be very aware of the fact that you are doing it, whereas most people probably don't even think of it. Ways we can consciously and unconsciously control our heart rate for that matter are as follows: think of something fearful, anxiety or panic provoking or naturally experience it, even thinking thoughts of increasing heart rate can produce the same result. Things that reduce the heart rate is doing or thinking anything that provokes relaxation. Take care.