Triplex of the heart (echocardiographic study). Ultrasonography is based on the principle of sound. Just as the sound has the capacity to reflect on surfaces, similarly the ultrasound (sound waves on higher frequencies from those we can hear), are reflected on surfaces. In ultrasonography we have a machine, the Doppler ultrasound, which can produce ultrasound and track its reflections at the same time. This machine has an embedded computer which studies the reflected waves and depending on the time which they need to be returned, it calculates the distance of the surface where the ultrasound is reflected and presents this surface on its screen. The whole procedure is done so fast that the surface which is presented on the screen moves as it does in real life.

With the triplex of the heart and those of big blood vessels we can estimate the size of the heart, the strength of its contraction (extrusion fragment), the functionality of the bulbs excluding stenosis or insufficiency of those, to track the collection of pericardial fluid, diagnose the existence of aortic aneurysm, to exclude serious cardiomyopathies (dilated or hypertrophic) etc.