Comparative Efficacity of Ephedrine Versus Norepinephrine to Correct Anesthesia Induction Related Hypotension

Exclusion Criteria

• •cardiac insufficiency with a left ventricular ejection fraction \< 50%
• •severe cardiomyopathy
• •severe cardiac valvular disease
• •use of enzyme converting inhibitors or sartans less than 24h before surgery
• •use of alpha2 antihypertension medication
• •chronic treatment by: noradrenaline or dopamine recapture inhibitors, tricyclic antidepressants, monoamine oxidase inhibitors