something wrong

http://books.google.com.au/books?id=nezE1Wmb_9wC&pg=PA155&dq=mitral+valve+pressure&hl=en&sa=X&ei=yN8zT8DdLo_yrQePqaDHDA&ved=0CDYQ6AEwADge#v=onepage&q=mitral%20valve%20pressure&f=false

http://eurheartj.oxfordjournals.org/content/5/8/660.full.pdf+html