Speckle tracking echocardiography-determined measures of global and regional left ventricular function correlate with functional capacity in patients with and without preserved ejection fraction

Table 3 Correlation of speckle tracking echocardiography (STE) measures in each wall of the left ventricle and DASI score of functional status

STE variable	Correlation of STE variable with DASI	P value	N	Correlation of EF with DASI in same subjects	P value
Long. strain AS^*†‡	–0.64	<0.001	34	0.43	0.011
Long. strain Ant^*	–0.66	0.003	18	0.59	0.01
Long. strain AL	–0.36	0.097	22	0.40	0.07
Long. strain IL^*†‡	–0.71	<0.001	24	0.59	0.002
Long. strain Inf^*†	–0.53	<0.001	43	0.47	0.002
Long. strain IS^*	–0.43	0.003	46	0.40	0.006
Circ. strain AS^*†	–0.46	0.001	47	0.46	0.001
Circ. strain Ant^†	–0.40	0.03	30	0.53	0.003
Circ. strain AL	–0.39	0.032	31	0.54	0.002
Circ. strain IL	–0.12	0.44	46	0.46	0.001
Circ. strain Inf^*	–0.44	0.003	45	0.51	<0.001
Circ. strain IS^*†	–0.58	<0.001	44	0.48	0.001
Rad. strain AS^*†	0.46	0.001	45	0.46	0.001
Rad. strain Ant	0.44	0.05	20	0.46	0.04
Rad. strain AL^†	0.52	0.008	25	0.50	0.012
Rad. strain IL^*	0.41	0.007	42	0.48	0.001
Rad. strain Inf^*†‡	0.67	<0.001	36	0.56	<0.001
Rad. strain IS^*†	0.49	0.002	38	0.56	<0.001

Abbreviations: AS anteroseptal, Ant anterior, AL anterolateral, Circ. circumferential, DASI Duke Activity Status Index, EF ejection fraction, Inf inferior, IL inferolateral, IS inferoseptal, Long. longitudinal, Rad. radial, STE speckle tracking echocardiography.
^*Linear association between regional measure of strain and DASI score remained significant after controlling for age and glomerular filtration rate in a multiple linear regression model.
^†P value <0.05 when comparing regional measure of strain between groups A, B and C.
^‡P value <0.05 when comparing regional measure of strain between group A and B.

ISSN: 1476-7120