These are both cardiac echos, focusing on the region of the left ventricle and aortic and mitral valves. The top image shows color flow data superimposed on the regular grey-scale images in the region of the aortic valve. The bottom image shows the region of the mitral valve. Try to locate the left ventricle and valve in each case. In both images, the apex of the heart is at the top, closest to the transducer that was used to send the sound waves into the chest and receive the reflected sound waves. When within the cardiac cycle would you expect to hear a murmur in each case?