This study evaluates the effects of different anesthetic techniques on QT, QTc, and Pwd in cesarean section. Half of participants received general anesthesia, while the other half received spinal anesthesia Electrocardiography (ECG) recordings were performed at preoperative, 5, 15, 30 min after initiation anesthesia and 30 min post-operatively. Hemodynamic state were also recorded at the same time intervals. QT, corrected QT (QTc), QT dispersion (QTd), QTc dispersion (QTcd), P-wave dispersion (Pwd), corrected JT interval, T wave (Tp-e), transmular dispersion of repolarization durations were measured from ECG records at predetermined time intervals of spinal or general anesthesia.

The anesthetic drugs used according general or regional anesthesia techniques can display proarrhythmic and antiarrhythmic effects by inducing cardiac electrical signals with different pathways.In addition, comorbid disease, hormonal changes, surgery procedures, and drug therapy can all cause arrhythmia in the intraoperative period. Likewise, pregnancy causes many changes hormonal and physiological in women. Hemodynamic and hormonal changes during pregnancy can cause effects proarrhythmogenic that cause premature atrial and ventricular beats to develop.

Inclusion Criteria:

1. American Society of Anesthesiologists physical status I-II
2. ages 20-40 years
3. parturient patients

Exclusion Criteria:

1. spinal cord and peripheral nervous system diseases;
2. hypovolemic and hemorrhagic shock;
3. increased intracranial pressure;
4. severe anemia;
5. systemic infection;
6. scoliosis;
7. congenital spinal anomalies;
8. vertebral colon metastatic lesions;
9. anticoagulant drug use;
10. diabetes mellitus;
11. hypo/hyperthyroidism;
12. atrial and/or ventricular hypertrophy on ECG;
13. cardiomyopathy;
14. valvular disease;
15. cardiac failure or chronic disease;
16. cardiomegaly
17. used medication causing QT interval prolongation.

elective cesarean section