echocardiography: systolic time-velocity integral (TVI) of superior vena cava reversal at end of expiration
echocardiography: systolic time-velocity integral (tvi) of superior vena cava reversal at end of expiration
echocardiogram SVC flow velocity systolic reversal TVI at end of expiration
echocardiogram svc flow velocity systolic reversal tvi at end of expiration