Is There a Predictive Value of the Frontal QRS-T Angle for Spinal Anesthesia-Induced Hypotension in Cesarean Delivery?

Objective: This study aimed to investigate the potential role of frontal QRS-T (fQRS-T) angle in predictingspinal anesthesia-induced hypotension (SAIH) in parturients undergoing elective cesarean section. Methods: A total of 120 parturients undergoing elective cesarean section under spinal anesthesia were included in the study. They were divided into two groups based on the development of SAIH (SAIH group, n = 91; no-hypotension group, n = 29). Patient characteristics, laboratory findings, fQRS-T angle, and other ECG parameters before and after spinal anesthesia were evaluated across the study groups. Results: Overall, 91 (75.8%) of the 120 patients developed SAIH, and ephedrine was administered to 76 (83.5%) of them. The fQRS-T angle and other ECG parameters did not show significant differences between the SAIH and no-hypotension groups. In the SAIH group, no significant differences in the fQRS-T angle were noted in relation to ephedrine usage or dose. No significant differences were observed between the two groups regarding age, BMI, comorbidity, smoking status, ASA classification, obstetric history, or laboratory findings. The fQRS-T angle did not correlate with maternal age, weight, or BMI, irrespective of the development of SAIH. Conclusions: Our findings indicate that the fQRS-T angle is not significantly associated with the likelihood of developing SAIH in parturients undergoing elective cesarean section or with the use and dosage of ephedrine in those who developed SAIH. Additionally, no other parameters (e.g., age, BMI, comorbidity, smoking status, ASA classification, other ECG parameters, or blood analysis findings) were associated with the development of SAIH.