Propofol and Etomidate Admixtures Comparisons Trial (PEAC Trial)

Inclusion Criteria: 1. Adult patients (age ≥18 years old) 2. Having endoscopic procedure at CUH with anesthesia 3. ASA 3 or above 4. Ejection Fraction test result available Exclusion Criteria: 1. Known allergies or adverse reactions to study drugs or study drug components or preservatives 2. Patient refusal 3. Clinician refusal 4. Documented cognitive impairments precluding subject ability to consent for themselves unless a surrogate documented legally acceptable decision maker consents for patient participation 5. Prisoner or incarcerated or patients held by law enforcement officials in custody 6. Pregnancy or patient refusal for pregnancy testing or screening (standard UTSW policy and protocol requires pregnancy testing for appropriate patients prior to anesthesia)