Management of Alpha Thalassemia in Pregnancy

Pre-Pregnancy Assessment and Risk Stratification

The American Heart Association recommends that women with alpha thalassemia considering pregnancy require comprehensive cardiac evaluation before conception, including cardiac MRI (T2*) to assess iron loading, echocardiography for chamber dimensions and function, and electrocardiography 1, 2, 3
Cardiac T2* assessment is essential as iron overload may result in cardiac complications during pregnancy's hemodynamic changes 1, 2
Heart disease accounts for approximately 70% of deaths in transfusion-dependent thalassemia patients, making cardiac evaluation the highest priority 2

The American College of Cardiology recommends assessing liver and cardiac iron burden before conception using MRI T2* imaging 1, 2
Women with severe heart or liver iron overload should receive intensified chelation therapy before attempting pregnancy 1, 3
Iron chelation must be discontinued during pregnancy due to teratogenic concerns, except deferoxamine may be restarted in the second/third trimester if severe iron overload threatens maternal cardiac function 1

The American College of Obstetricians and Gynecologists recommends maintaining hemoglobin at approximately 10 g/dL through transfusion therapy during pregnancy 1
Blood consumption typically increases during pregnancy, potentially worsening iron overload 1, 2
Consider restarting deferoxamine chelation toward the end of second trimester in patients with severe cardiac or hepatic iron overload 1

The American College of Chest Physicians recommends prophylaxis with heparin or low-molecular-weight heparin, particularly in splenectomized patients and those with hemoglobin H disease 1, 3
Splenectomized thalassemia patients have particularly high thrombotic risk requiring careful anticoagulation monitoring 3

The American Heart Association recommends performing echocardiography each trimester to detect early cardiac decompensation 1
Monitor for arrhythmias, particularly atrial fibrillation which occurs in up to 14% of patients with severe iron overload 2
Screen aggressively for gestational diabetes, preeclampsia, and hypertension as these occur frequently in thalassemia pregnancies 1, 2

The American College of Obstetricians and Gynecologists recommends resuming iron chelation therapy immediately postpartum if breastfeeding is not planned, or after weaning 1
Continue thromboprophylaxis for at least 6 weeks postpartum 3
Cardiac complications can occur postpartum; maintain surveillance 1, 2

Thromboprophylaxis is essential in hemoglobin H disease, especially if splenectomized 1, 3
At-risk families require pre-conceptual genetic counseling and options for preimplantation genetic testing for alpha thalassemia major (hydrops fetalis) 1, 3