Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Echocardiography depicting the artifact (arrows) E, expiration; I, inspiration; MV, mitral valve; TW, thoracic wall. (a,c) Apical four-chamber views and (b,d) M-mode of the artifact in the left ventricle. The immobile part (arrow) and the mobile one (arrowhead) may be observed. The respiratory variation that resembles the lung 'sinusoid sign' is either fully (panel b) or partially (panel d) visible.
