Analysis of Variance.

aThe sensitivities of 5 groups were not all the same by X2 test with a p value bThe specificities of 5 groups were not all the same by X2 test with a p value cWithout significant difference as p value ≥ 0.05.dWith significant difference as p value STIC, spatiotemporal image correlation; ECEE, extended cardiac echography examination; 4 CV, 4 chamber view; OTV, outflow tract view; VTV, three-vessel trachea view.