Abstract
High Definition Power Flow Doppler (HDPD) is a bi-directional power Doppler imaging mode. B-flow is a direct-volume non-gated scanning tool that images blood flow in real-time. These ultrasound modalities have improved images of the fetal cardiovascular system to near-angiographic quality. Each has its particular advantages, which are illustrated with examples of fetal cardiovascular malformations obtained with these tools. HDPD and B-flow provide images not available to practitioners even five years ago.