Table 4.

Univariate and LV Mass Adjusted Correlations Between PET‐Derived Myocardial External Efficiency and Myocardial Function in CA Patients

	Unadjusted		LV Mass Adjusted
	R 2	P Value	R 2	P Value
Echocardiography
E/e′	0.14	0.07	···	···
MWErest	0.51	<0.0001	0.57	<0.0001
MWEpeak	0.48	<0.0001	0.50	<0.01
LVGLSrest	0.61	<0.0001	0.61	<0.0001
LVGLSpeak	0.60	<0.0001	0.60	<0.0001
ΔA‐B strain difference	0.27	<0.01	0.40	<0.05
3D LV mass	0.39	<0.01	···	···
Invasive hemodynamics
ΔCO/ΔVO2	0.21	<0.05	0.35	<0.05
CIrest	0.36	<0.01	0.46	<0.01
CIpeak	0.52	<0.0001	0.55	<0.01
SVres	0.37	<0.01	0.53	<0.01
SVpeak	0.44	<0.01	0.63	<0.0001
VO2peak	0.31	<0.01	0.42	<0.01
PCWPrest	0.11	0.13	···	···
PCWPpeak	0.04	0.40	···	···
PACrest	0.43	<0.01	0.46	<0.01
PACpeak	0.43	<0.01	0.45	<0.01
RAPrest	0.11	0.14	···	···
RAPpeak	0.13	0.11	···	···
PET‐derived parameters
MBF	0.44	<0.0001	0.46	<0.01
Total work	0.44	<0.0001	0.76	<0.0001
Total MVO2	0.14	0.07	···	···

3D indicates three‐dimensional; A‐B, apical to basal; CA, cardiac amyloidosis; CI, cardiac index; CO, cardiac output; LV, left ventricular; LVGLS, left ventricular global longitudinal strain; MBF, myocardial blood flow; MVO₂, myocardial oxygen consumption; MWE, myocardial work efficiency; PAC, pulmonary arterial compliance; PCWP, pulmonary capillary wedge pressure; PET, positron emission tomography; RAP, right atrial pressure; SV, stroke volume; VO₂, external oxygen consumption.