Comparative study of hemodynamic effects of carbetocin and oxytocin in patient undergoing elective lower segment caesarean section under spinal anaesthesia: An observational analytical study - Sonam Pattanaik; Arati Rai; Sofia Batool; Lhamo Dolma; Meyong Pincho Bhutia; Tsering Yougyal (Indian Journal of Clinical Anaesthesia, 2026)