If my blood pressure goes real high and real low would a av node ablation help me not go fast nor to low? i know i would be dependent on my pacemaker.

Depends: Do you mean your heart rate goes "real high and real low"? An ablation is typically performed for an irregular heart rhythm that is not manageable with medications. Be sure to get a clear diagnosis and review with the cardiologist all of your options!

AbsolutelyNot, BP is: determined by the interaction of cardiac output combined with relative opening (Total Peripheral Resistance) of all the arterioles (end arteries just prior to capillaries), body wide, both under direct split-second control from the brain 24/7. The AV node electrically links the atrial & ventricular muscles; does not directly affect cardiac output or TPR. Ablation would make you dependent & worse!