Anesthesia for the Parturient with Cardiovascular Disease
摘要
Uterine contractions cause autotransfusion and increase pulmonary artery hypertension risking heart failure and arrhythmia. General anesthesia reduces systemic vascular resistance and can increase a right-to-left shunt. The right-to-left shunt reduces pulmonary perfusion and increases hypoxia. Oxygen is a pulmonary vasodilator and decreases the blood flow across the right-to-left shunt.