Low dose dopamine in the dosage will cause the blood vessels of kidney expansion area. If increase the dose of the drug in higher level will stimulate heart contraction force with your heart rate increases.
Dosage of dopamine in the blood vessels in the kidneys to make less expansion. If additional dose levels to encourage greater force with a heart rate of the heart increased.
Low dose dopamine in drug will make the kidney blood vessel growth. If the dosage level, more will stimulate your heart contraction along with heart rate increases.