Continuous Versus Bolus Administration of Norepinephrine to Treat Hypotension During Anesthetic Induction

In patients randomized to continuous norepinephrine administration, hypotension (= mean arterial pressure \< 65mmHg) will be treated with continuous norepinephrine infusion. The norepinephrine perfusion line will be connected to the saline infusion line using a three-way valve. Treating anesthesiologists will be free to reduce or increase the norepinephrine infusion rate anytime.