You are incorrect - our patient's murmur at the lower left sternal edge is best described as holosystolic with a slight decrescendo configuration.
Your choice: Mid, long, crescendo-decrescendo murmur
This is a graphic example of a mid systolic, long murmur with a crescendo-decrescendo shape. Let us listen to and observe this murmur together. Note that the murmur begins after the first heart sound, peaks early in systole and is of high frequency.