Cardio| S3 Heart Sound

1.04 S3 Heart Sound Cardiovacular system reveiw for the USMLE Step 1 exam. The S3 heart sound, also called an S3 gallop or ventricular gallop, is an extra sound that occurs in early diastole during the ventricular filling phase It can be normal for some people and a sign of disease in others It is caused by a dilated or floppy ventricle and is associated with dilated or floppy ventricles. S3 can also be caused by increases in volume load on the ventricles It is commonly found in children and young adults, athletes, and people who are pregnant It is heard best when at the apex of the heart when the patient is placed in the left lateral decubitus position