hi i'm tom cook i'm an emergency physician and i practice with prisma health and the university of south carolina this is a short video discussing the use of mapsy as a way to assess left ventricular function maps is an acronym that stands for mitral annular plane systolic excursion and it's a very very simple way of evaluating for left ventricular function in your patients to do this you need to get an apical 4 chamber view and what we need to focus on is the mitral valve and in particular the annulus around the mitral valve so the analysis is a fiber structure that sort of holds the valve into place and we need to focus on this part of the screen on the lateral aspect of that anulus and we're going to measure its movement as it goes through the cardiac cycles it moves towards and away from the apex of the heart to do this we're going to go out of b mode into m mode and we're going to take our m mode cursor and we're going to move it so that it goes over the mitral angle it's the lateral aspect of the mitral angulus and we're trying to get the waveform that you see here on the screen when we do get an adequate image we go ahead and freeze the image and now we have to measure this distance from this distance and it gives us an indication of how well that heart contracts in the longitudinal plane so we'll go into our calipers we're going to measure mapsy and when we do that and we touch the screen it gives us two a parallel lines we put the first line down here in the trough and we put the second line on the peak and we take that measurement which we see up here which is 17. so normal for an adult male is 13 or greater and normal for an adult female is 11 or greater and we can see that this patient has a very normal mapsy value so in summary maps is a great way to very quickly and quantitatively estimate your patient's left ventricular function and it gives you a lot of information for taking care of a variety of conditions that we see in the emergency department
