Case Report
Copyright ©The Author(s) 2022.
World J Anesthesiol. Sep 30, 2022; 11(1): 1-7
Published online Sep 30, 2022. doi: 10.5313/wja.v11.i1.1
Figure 1
Figure 1 The position of the apical cannula observed by esophageal ultrasound. A: It showed the entrance orifice facing the mitral valve; B: It showed the tip cannula positioned by three-dimensional ultrasound.