Second Heart Sounds Second Heart Sound and a Tumor Plop Another heart sound configuration which mimics a split second heart sound is a single second heart sound followed by a tumor plop (a transient which occurs early in diastole).If you move the stethoscope head to the pulmonic area the tumor plop will disappear. If you continue to hear two distinct sounds at the pulmonic area the likelihood is that you are hearing a split second heart sound.The timing and frequency of a tumor plop are identical to that of a third heart sound gallop. It is not possible to distinguish one from the other. play pause Position: Mitral Chestpiece: Diaphragm Maneuver: Supine Phonocardiogram Cardiac Animation Table of Contents 1Second Heart Sound - Physiologically Split #2 2Second Heart Sound with Persistent Splitting 3Second Heart Sound with Fixed Splitting 4Second Heart Sound: Fixed Splitting, Increased Aortic Intensity 5Second Heart Sound: Fixed Splitting, Decreased Aortic Intensity 6Second Heart Sound and Late Systolic Click 7Second Heart Sound and a Tumor Plop 8Opening Snap and Second Heart Sound Practice Drill