Prospective Study
Copyright ©The Author(s) 2015.
World J Cardiol. Nov 26, 2015; 7(11): 801-807
Published online Nov 26, 2015. doi: 10.4330/wjc.v7.i11.801
Figure 4
Figure 4 Correlation of optimal PV intervals measured by echocardiography and QuickOpt.