1st HS:
1) mitral area-5th left intercostal space,5cm from midline
2) tricuspid area-6th left costosternal junction close to sternum
2nd HS:
3)aortic area-2nd right of costosternal junction close to sternum
4)pulmonary area-2nd left of intercostal space close to sternum
3rd HS:
mitral area when person in recumbent postion and leaning at left side
