Overview
Functional single ventricle physiology refers to congenital heart defects where a single ventricle supports the circulation for both pulmonary and systemic needs, often managed with complex surgical palliation like the Fontan procedure. These patients require meticulous management due to unique hemodynamic challenges and potential complications 1.Diagnosis
Echocardiography essential for assessing ventricular function and anatomy 1.
Hemodynamic evaluation including cardiac catheterization to confirm single ventricle physiology and assess shunt patency 1.
Coagulation profile necessary due to common coagulation factor deficiencies 1.Management
Close monitoring of fluid balance and systemic vascular resistance 1.
Anticoagulation tailored to prevent thrombosis while managing bleeding risks 1.
Medication adjustments for heart failure management, such as diuretics and inotropic support, as indicated 1.Special Populations
Pregnancy: Requires careful anesthetic management; neuraxial anesthesia carries risks including delayed hematoma despite adherence to guidelines 1.
Comorbidities: Increased vigilance for thromboembolic events and coagulopathy, especially post-Fontan patients on anticoagulation 1.Key Recommendations
Perform comprehensive coagulation profile assessment before procedures involving neuraxial anesthesia in patients with Fontan circulation to mitigate bleeding risks (Evidence: Moderate 1).
Monitor closely for signs of delayed complications such as hematoma, even after seemingly uneventful procedures like cesarean delivery under spinal anesthesia 1.
Tailor anticoagulation strategies carefully balancing the risk of thrombosis against bleeding complications in pregnant women with single ventricle physiology (Evidence: Expert opinion 1).References
1 Chiaghana CO, Bremer JM, Sappenfield JW, Wendling AL. Delayed Neuraxial Hematoma in Parturient With Fontan Circulation Following Neuraxial Anesthesia for Cesarean Section. Regional anesthesia and pain medicine 2016. link