This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
Which IV anesthetic does not cause cardiac depression 
Select and explain. 
A. Etomidate, B. Ketamine, C. Methohexital, D. Thiopentone
A: Etomidate
Answer: A: Etomidate 
Explanation: Etomidate:- * Cardiovascular stability after induction is a major advantage of Etomidate in contrast to Propofol or Barbiturates. * Induction doses of Etomidate typically produces: no change/small increase in hea rate; little or no decrease in blood pressure or cardiac output. Etomidate has little effect on coronary perfusion pressure while reducing myocardial O2 consumption. * It is a preferred choice of induction anesthetic in patients prone to hypotenstion or with low cardiac reserve. Ref:- Goodman & Gilman Pharmacological Basis of Therapeutics 13th Ed; Pg num:- 391