Key result
Halothane shows no advantage over morphine for pre-incision serious hypotension, mortality, or hospital stay.
Why the study?
Hemodynamic differences and clinical outcomes between morphine and halothane as primary anesthetic agents for cardiac valvular surgery were not clearly established.
Does halothane improve hemodynamics or clinical outcomes compared to morphine in patients undergoing cardiac valvular repair and/or replacement?
Population
128 patients undergoing cardiac valvular repair and/or replacement
Comparison
Halothane vs morphine as primary anesthetic agents
Design
Prospective randomized comparison
Follow-up
Duration of hospital stay and postoperative ICU stay
Authors
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Similar serious hypotension rates with either agent should not change induction practice; leaves open need for modern randomized comparisons in valvular surgery.
RCT (n=128)
Randomized
Does halothane improve hemodynamics or clinical outcomes compared to morphine in patients undergoing cardiac valvular repair and/or replacement?
Absolute Event Rate: 9.8% vs 10.4%
While halothane and morphine exhibit different hemodynamic profiles during cardiac valve surgery, neither anesthetic agent provides a clear clinical advantage regarding mortality or length of stay.
Conahan et al. (1973) conducted an RCT in Cardiac valvular repair and/or replacement (n=128). Halothane vs. Morphine was evaluated on Serious hypotension (systolic blood pressure ≤70 torr before incision). Halothane and morphine resulted in similar rates of serious hypotension before incision (9.8% vs 10.4%), with no clear advantage for either agent in mortality or hospital stay.
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