Table 4.

Correlations between vorticity and invasive indexes

	r	P Value
Heart rate	0.63	<0.001
Ejection fraction	0.53	<0.001
End-systolic volume		0.49
End-diastolic volume	0.33	0.018
End-systolic pressure	−0.65	<0.001
End-diastolic pressure		0.14
dP/dtmax	0.72	<0.001
dP/dtmin		0.57
dV/dtmax	0.71	<0.001
dV/dtmin	−0.84	<0.001
τ	−0.75	<0.001

	Coefficent	SE	P Value
Intercept	523.7813	62.6331	<0.001
τ	−3.8583	1.0842	<0.001
End-systolic pressure	−1.8544	0.4098	<0.001
dV/dtmin	−1.2653	0.1541	<0.001
	Residual SE: 52.13	Adjusted R2: 0.8536	<0.001

The time constant (τ), end-systolic pressure, and dV/dt_min were selected as independent predictors of peak early diastolic vorticity from the multiple regression analysis. SE, standard error.