<qa>  What is a 3D echo?Tissue Doppler Imaging is a noninvasive technique that measures the speed of heart muscle movement. Tissue Synchronization Imaging measures how well the lower pumping chambers of the heart are working together. A 3D echo is a 3 dimensional picture of a beating heart that allows your doctor to see the heart from any angle. These techniques are noninvasive, meaning on the outside of your body. The size and function of the ventricles the lower part of the heart can change under different conditions. Using these techniques we will attempt to better determine how well the ventricles function during illness and health. 