 Let's discuss restrictive cardiomyopathy's and restrictive cardiomyopathy's the walls of the heart are rigid But they're not thickened as you've seen in this picture. We have heart muscles It may appear to be a little bit large in this drawing. However, this is a normal size what we're looking at here What we're had what we're dealing with however is a restriction specifically more common in the atrium So we can see a bilateral atrial thickening And a restriction of the ventricles. So this leads us to a diastolic dysfunction Due to a lack of the ability for those ventricles to stretch and fill with blood properly and then Under a normal systole eject a normal cardiac output worth of blood We can see a restrictive cardiomyopathy in lawfler endocarditis Lawfler endocarditis is a response to a parasitic infection and we see it associated with a hyper Eosinophilic syndrome So we have a lot of eosinophils responding to this parasitic infection And so the histology will show up and show eosinophilic infiltrates in the myocardium leading to that restriction So what are the possible causes of? Restrictive cardiomyopathies well, we can use the mnemonic puppy leash and on puppy leash We use the P of puppy and then all the letters of leash So the P stands for post-radiation fibrosis So a radiation of any type in the chest area can cause a restrictive Cardiomyopathy that may potentially affect the paracardium as well The L. We just mentioned was lawfler endocarditis The E in leash is endocardial fibroelastosis. This is a thick fibroelastic tissue of the endocardium in young children Emeloidosis can cause a restrictive cardiomyopathy Alongside of that sarcoidosis can cause a restrictive cardiomyopathy and then another one hemochromatosis Can cause a restrictive cardiomyopathy due to the deposition of the iron into the muscle fibers there Treatment of a restrictive cardiomyopathy is a little bit Difficult because there's really no treatment For the actual restriction. We just treat the causative conditions So if a patient has Ameloidosis or sarcoidosis or hemochromatosis We're going to go back and we're going to treat those the way that they need to be treated and help reduce the restrictive effects on the heart