ERROR: at 37:15 min we left out "alpha" /180 in the equation illustrated at the bottom of the slide. ERROR: Mitral Valve Part 3 lecture at 36:10, the EROA calculation should read: EROA = Rvol/TVImr = 13.1 cm3/191cm = 0.07 cm2 Special thanks to Trent Wray and others who alerted us to the error. We will re-record the lecture and remove the error when time permits. Sorry for the mistake. Error: Mitral Valve part 3 lecture 32 min:42 seconds – Table: Measures of MR. Moderate MR is 30-59 mL instead of 30-69 mL. Shoud say 30-59 for moderate as grreater than 60ml is severe! Thanks to Juan G. Ripoll for noticing this error!