[Tricuspid valve morphology and function evaluated by transthoracic real-time three-dimensional echocardiography]

Tricuspid valve (TV) morphology and function evaluation plays a key role in several cardiac diseases, including left-sided valvular diseases and heart failure. However, TV is structurally complex and, differently from aortic and mitral valves, cannot be visualized in a single two-dimensional echocardiographic view, neither transthoracic nor transesophageal (i.e., simultaneous imaging of the three TV leaflets and their attachment to the annulus is not feasible). Conversely, real-time three-dimensional transthoracic echocardiography allows complete visualization of the TV apparatus from multiple views. This can lead to an improvement of our understanding about the pathophysiological mechanisms underlying TV diseases and functional tricuspid regurgitation, and may suggest new surgical techniques in order to improve surgical outcomes. The present review focuses on the state-of-the-art of real-time three-dimensional transthoracic echocardiography in TV morphology and function evaluation with its clinical applications and limits.