Why the study?
Does preoperative stress and postoperative pain alter the heart rate response to physiologic maneuvers compared to normal controls?
Population
Normal control subjects, preoperative patients, and postoperative patients
Comparison
Preoperative stress and postoperative pain vs Normal control subjects
Design
Cross-sectional
Authors
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Reduced heart rate responsiveness to maneuvers should be anticipated perioperatively; supports autonomic blunting by surgical stress but leaves additive pain effects open.
Does preoperative stress and postoperative pain alter the heart rate response to physiologic maneuvers compared to normal controls?
Tonic stress from surgery impairs the autonomic nervous system's ability to respond to physiologic maneuvers, reducing heart rate responsiveness by 50%.
Heller et al. (1984) studied this question.
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