Key result
Patients who developed post-spinal hypotension had a significantly higher mean baseline heart rate (100.2 beats/min) compared to those who did not (91.02 beats/min, p=0.001), with a heart rate >92 beats/min identified as a predictive cut-point.
Why the study?
Hypotension is a common adverse effect of subarachnoid block, and the study aimed to determine whether preoperative heart rate predicts post-spinal hypotension in obstetric patients.
Does baseline heart rate predict post-spinal hypotension in healthy full-term pregnant women undergoing elective cesarean section?
Cross-Sectional (n=100)
Yes
Does baseline heart rate predict post-spinal hypotension in healthy full-term pregnant women undergoing elective cesarean section?
A preoperative baseline heart rate > 92 beats/min is a useful predictor for post-spinal hypotension in pregnant women undergoing elective cesarean section.
Background: Although spinal anesthesia is generally well tolerated, hypotension is a common adverse effectof subarachnoid block in some patients. In pregnant women, it was demonstrated that sympathetic activity isincreased as compared with that of not pregnant women.Aim of study: To determine whether preoperative heart rate is a predictor for post spinal hypotension or not inobstetric patients.Methods: A prospective trial study that was conducted in the Obstetrics operating room at Al-Imamain Al-Kadhmain and Baghdad Teaching Hospitals, Baghdad, Iraq for a period of 12 months from Nov. 2019 to Nov.2020. It involved 100 healthy full term pregnant women scheduled for elective C/S under spinal anesthesia.Baseline systolic, diastolic, mean arterial pressure, and heart rate were recorded. Blood pressure was monitoredwith an automated cuff blood pressure monitor at three-minute intervals until 30 minutes then every five minutes.Results: In this study, 55% of study patients complained from hypotension after spinal anesthesia. mean ofbaseline HR was significantly higher in patients who developed post spinal hypotension than that in those whodidn’t. The cut point of baseline HR was 92 beats/mint., so baseline HR > 92 beats/mint. is predictive for postspinal hypotension. Requirement of ephedrine was significantly higher in hypotensive patients who had baselineHR > 92 than that in those who had baseline HR ≤ 92.Conclusion: Preoperative heart is a good predictor for post spinal hypotension in pregnant women underwentcesarean section under spinal c anesthesia.
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Ismail et al. (2023) conducted a cross-sectional in Pregnancy requiring elective cesarean section (n=100). Post-spinal hypotension vs. No post-spinal hypotension was evaluated on Mean baseline heart rate (beats/min) (p=0.001). Patients who developed post-spinal hypotension had a significantly higher mean baseline heart rate (100.2 beats/min) compared to those who did not (91.02 beats/min, p=0.001), with a heart rate >92 beats/min identified as a predictive cut-point.
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