By Sharon Kay. Real ICU cases, with echos performed by ICU doctors, where echocardiography made the difference… In the next few posts we’re going back to basics – could you make your PLAX better? Pierre’s Echo guide is here The British Echo Society has some great free echo resources This site from George John is tailored towards ICU echo. Also free once you register. Here is a free and excellent echo atlas from Yale Echo Basics, from Denmark is a simple an elegant site with excellent videos the video Back to basics - PLAX from Oliver Flower on Vimeo.