4:19 Heart Sounds and Heart Murmurs, Animation. 0:28 S1, S2, S3, and S4 Heart Sounds | MedStudy's Heart Sounds 0:11 Normal Heart Sound- normal speed 1:08 S3 Heart Sound - MEDZCOOL 1:34 S3 vs S4 Heart Sound 0:11 Normal Third Heart Sound (S3) 1:21 S3 and S4 Gallop - Heart Sounds - MEDZCOOL 7:38 Heart Sounds Made Easy - S1, S2, S3, S4 and Murmurs (Systolic and Diastolic) 0:52 Heart Sounds Quiz | MedStudy's Heart Sounds 1:34 S4 Heart Sound - MEDZCOOL 1:13 Normal Heart Sounds - MEDZCOOL 1:29 Auscultation of the Heart 12:07 Systolic murmurs, diastolic murmurs, and extra heart sounds - Part 1 | NCLEX-RN | Khan Academy