Autoregulation is the maintenance of constant blood flow to an organ in spite of fluctuations in Blood pressure. It involves the relaxation of myocardium and contraction. It is local.
I know that autoregulation is best done in the brain, well in kidneys and badly in skeletal muscle. I am interested how it is in the heart. I think it should be at least good. Brain can be thought more important. However, I am not sure.
How good is the autoregulation of the blood flow in the heart?