Table 3.

Association between strain and echocardiographic measures of RV function by time period

Dependent Variable	Predictor	Estimate (95% CI); P Value*
		All Data	Pre-Op	After Repair†	Immediate Post-Op	Recovery
GLS	TAPSEZ	−0.88 (−1.19 to −0.58); <0.0001	−0.89 (−1.46 to 0.31); 0.0033	−0.58 (−0.99 to −0.17); 0.006	−0.29 (−1.60 to 1.02); 0.64	−0.70 (−1.14 to −0.26); 0.0024
	RV FAC, %	−0.48 (−0.51 to −0.45); <0.0001	−0.53 (−0.57 to −0.49); <0.0001	−0.42 (−0.47 to −0.37); <0.0001	−0.52 (−0.63 to −0.40); <0.0001	−0.39 (−0.45 to −0.34); <0.0001
	RV s’, m/s	−0.85 (−1.19 to −0.51); <0.0001	−0.38 (−1.04 to −0.27); 0.24	−0.58 (−1.09 to −0.08); 0.026	0.20 (−2.65 to 3.04); 0.89	−0.79 (−1.30 to −0.28); 0.0036
	Pulmonary hypertension	4.71 (3.37 to 6.04); <0.0001	2.30 (−3.38 to 7.99); 0.32	3.45 (1.90 to 5.00); 0.0001	−4.08 (−10.05 to 1.89); 0.17	3.47 (1.85 to 5.08); 0.0003
FWS	TAPSEZ	−0.94 (−1.27 to −0.61); <0.0001	−1.01 (−1.60 to −0.42); 0.0013	−0.46 (−0.92 to −0.01); 0.046	−0.21 (−1.43 to 1.02); 0.72	−0.56 (−1.08 to −0.05); 0.03
	RV FAC, %	−0.48 (−0.52 to −0.45); <0.0001	−0.52 (−0.57 to −0.48); <0.0001	−0.40 (−0.46 to −0.34); <0.0001	−0.48 (−0.60 to −0.36); <0.0001	−0.38 (−0.45 to −0.30); <0.0001
	RV s’, m/s	−0.85 (−1.20 to −0.49); <0.0001	−0.76 (−1.40 to −0.13); 0.021	−0.08 (−0.66 to −0.50); 0.78	0.09 (−2.69 to 2.88); 0.94	−0.16 (−0.78 to 0.46); 0.61
	Pulmonary hypertension	5.05 (3.64 to 6.46); <0.0001	2.43 (−3.37 to 8.23); 0.31	3.10 (1.41 to 4.80); 0.0009	−3.86 (−9.12 to 2.41); 0.24	3.07 (1.24 to 4.91); 0.0026

Definition of abbreviations: 95% CI = 95% confidence interval; FAC = fractional area change; FWS = free-wall strain; GLS = global longitudinal strain; post-op = postoperative; pre-op = preoperative; RV = right ventricle; s’ = tricuspid annular peak systolic velocity; TAPSEZ = tricuspid annular plane systolic excursion z-score.

^*All P values are for comparisons among pre-op, immediate post-op, and recovery periods.

^†Includes both immediate post-op and recovery data.