Why the study?
Large ASD with pulmonary hypertension undergoing non-cardiac surgery poses significant anaesthetic challenges due to risks of increased pulmonary vascular resistance, shunt reversal, heart failure, and fatal arrhythmias.
Meticulous intraoperative management of pulmonary and systemic vascular resistance is crucial for successful non-cardiac surgery in patients with large ASD and severe pulmonary hypertension.
Highlights need for vigilant monitoring to prevent PVR rise in ASD-PAH non-cardiac surgery; leaves open optimal anesthetic protocols.
In adult population after bicuspid aortic valve, atrial septal defect (ASD) is the most common congenital acyanotic heart disease, with high prevalence in females. Large ASD with pulmonary hypertension (PAH) posted for non-cardiac surgery poses a challenge to anaesthesiologists because intraoperative hypercarbia, hypoxemia, and hyperthermia can result in increased pulmonary vascular resistance (PVR), which can result in shunt reversal, congestive heart failure, and fatal arrhythmias. We report successful anaesthetic management of 48yrs female case of recurrent astrocytoma posted for craniotomy. Patient was having large ostium secundum ASD (35 mm in diameter), with severe PAH having PASP 75mmhg by TR jet, with dilated RA/RV, moderate TR and LVEF 55% under GA, with titrated induction, avoiding rise in PVR and maintaining systemic vascular resistance (SVR) with vasopressors intraoperatively to avoid shunt reversal. :To concludepatients with severe PHT due to large ASD, require meticulous intraoperative management to prevent any rise in PAH, and maintenance of systemic vascular resistance with optimal oxygen delivery and excellent postoperative analgesia for excellent outcome.
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Koli et al. (2022) studied this question.
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