Three-dimensional thoracic aorta principal strain analysis from routine ECG-gated computerized tomography: feasibility in patients undergoing transcatheter aortic valve replacement

Table 3 Correlations between 3-dimensional peak principal strain amplitude calculations using ECG-gated CTA of the ascending aorta and global thoracic aorta and clinical, hemodynamic and echocardiographic variables using linear regression analysis

	Ascending Aorta		Global Thoracic Aorta
Parameter	β	p-value	β	p-value
Clinical
Age	-0.07	0.76	0.005	0.97
Gender	2.43	0.41	0.59	0.69
Height	-0.23	0.13	-0.09	0.2650
Weight	0.04	0.61	0.02	0.68
Body mass index	0.45	0.09	0.18	0.19
Body surface area	1.04	0.86	0.57	0.84
Hypertension	1.85	0.50	-0.001	1.00
Diabetes mellitus	-2.88	0.45	-2.20	0.24
Hyperlipidemia	0.43	0.87	0.31	0.82
Coronary artery disease	-0.56	0.84	-0.08	0.95
Prior myocardial infarction	0.86	0.77	0.65	0.66
Congestive heart failure	-1.14	0.68	0.04	0.97
Stroke	9.89	0.004	4.05	0.02
Hemodynamic
Heart rate	0.009	0.94	-0.005	0.93
Systolic blood pressure	0.03	0.71	0.02	0.68
Diastolic blood pressure	-0.09	0.41	-0.06	0.28
Mean arterial pressure	-0.05	0.69	-0.03	0.59
Pulse pressure	0.11	0.25	0.07	0.16
Echocardiographic
LV ejection fraction	0.07	0.50	0.02	0.67
LV end-diastolic volume index	0.001	0.99	0.03	0.41
LV end-systolic volume index	-0.002	0.98	0.03	0.49
AV annulus diameter	-0.08	0.85	0.17	0.43
AV area	15.41	0.0005	8.54	0.00004
AV mean pressure gradient	-0.38	0.0004	-0.19	0.0005
AV peak pressure gradient	-0.23	0.0003	-0.11	0.0005
Systemic vascular resistance	-0.0001	0.49	-0.001	0.30
Systemic arterial compliance	-2.29	0.55	-0.97	0.61
Systemic arterial elastance	-0.64	0.73	-0.61	0.51
Valvulo-arterial impedance	0.03	0.77	0.01	0.74

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