This document contains a collection of fetal echocardiography images from the second and third trimesters. The American Institute of Ultrasound in Medicine thanks GE for providing the ultrasound equipment used to capture some of the images. The images show normal anatomy, views, and measurements needed to assess fetal heart structure and function during routine echocardiography exams. Key structures like the four chambers, valves, great vessels, and ductus venosus are represented.

1. AIUM Image Library:
Fetal Echocardiography
The American Institute of Ultrasound in Medicine thanks GE for providing equipment used to obtain some of the images within this document.
We appreciate their commitment and generous support for ultrasound education.

2. Second Trimester
Cardiac Apex Position

3. Second Trimester
Situs: Breech Presentation

4. Second Trimester
Situs: Cephalic Presentation
AO = aorta
LA = left atrium
LV = left ventricle
MV = mitral valve
RA = right atrium
RV = right ventricle
SP = spine
TV = tricuspid valve

5. Second Trimester
M-Mode

6. Second Trimester
Left Ventricular Outflow Tract
(LVOT)

7. Second trimester
Right Ventricular Outflow Tract
(RVOT)

8. Second trimester
Right Ventricular Outflow Tract
RVOT = right ventricular outflow tract

9. Second trimester
Outflow Tracts: Short Axis View

10. Second Trimester
Great Vessels: Short Axis View
AO = aorta
PV = pulmonary vein
RV = right ventricle

11. 3 Vessel & Trachea View
Second Trimester 3 Vessel Views
Ductal Arch View
AO = aorta
PA = pulmonary artery
SVC = superior vena cava
LPA = left pulmonary artery
RPA = right pulmonary artery
3 Vessel View
RPA LPA

12. Second Trimester
3 Vessel & Trachea (3VT) View
PA = pulmonary artery
AO = aorta
SVC = superior vena cava

13. Third Trimester
3 Vessel & Trachea (3VT) View

14. Second Trimester
Pulmonary Veins (PV)

15. Second Trimester
Aortic Arch

16. Second Trimester
Ductal Arch

17. Second Trimester
Ventricles: Short Axis View
LV = left ventricle
RV = right ventricle

18. Second Trimester
Superior & Inferior Vena Cava
IVC = inferior vena cava
RA = right atrium
SVC = superior vena cava

19. Second Trimester
Color Doppler
IVC = inferior vena cava
SVC = superior vena cava

20. Third Trimester
Pulmonary Veins

21. Second Trimester
Foramen Ovale

22. Second Trimester
Foramen Ovale

23. Second Trimester
Atrioventricular Valves: Color Doppler
MV = mitral valve
TV = tricuspid valve

24. Second Trimester
Interventricular Septum

25. Second Trimester
Semilunar Valves: Color Doppler
LVOT = left ventricular outflow tract
RVOT = right ventricular outflow tract

26. Second Trimester
Branching of the Pulmonary Arteries
LPA = left pulmonary artery
RPA = right pulmonary artery

27. Second Trimester
Ductal Arch

28. Second Trimester
Aortic Arch

29. 23week gestation
Atrioventricular valves: Pulsed Doppler

30. Second Trimester
Pulmonary Valve: Pulsed Doppler

31. Second Trimester
Aortic Valve: Pulsed Doppler

32. Second Trimester
Ductus Venosus: Pulsed Doppler

33. Second Trimester
Aortic Annulus
Measurement in Systole
AO = aorta

34. Second Trimester
Pulmonary Artery
Measurement in Systole
PA = pulmonary artery

35. Second Trimester
Atrioventricular Valve Annulus:
Measurement in Diastole

36. Second Trimester
Ventricular Lengths

37. Second Trimester
Aortic Arch, Isthmus, Ductus Arteriosus
Diameter Measurements

38. Second Trimester
Main Pulmonary Artery
Diameter Measurement
MPA = main pulmonary artery

39. Third Trimester
Ventricular Diameters

40. Second Trimester
Ventricular Free Wall Thickness

41. Second Trimester
Interventricular Septum Thickness
IVS = interventricular septum

42. Third Trimester
Cardiothoracic Ratio
Card-circ = cardiac circumference
Th-circ = thoracic circumference

43. Third Trimester
Systolic Dimensions of the Ventricles

44. Second Trimester
Transverse Dimensions of the Atria

45. Third Trimester
Foramen Ovale
FO = foramen ovale

46. Third Trimester
Location for Measurement of
Branch Pulmonary Arteries