Table 2.

NYHA class, echocardiography, and SPECT MPI at follow-up according to LV lead position

	All patients (n = 79)	Recommended (n = 41)	Non-recommended (n = 27)	Apex or scar (n = 11)	P value*	P value†	P value‡
NYHA class, n(%)
6 months, I/II/III	21 (26.6)/48(60.8)/10(12.7)	11 (26.8)/23(56.1)/7(17.1)	9(33.3)/17(63.0)/1(3.7)	1(9.1)/8(72.7)/2(18.2)	.242	1.000	.238
Improvement by ≥ 1 class	58(73.4)	28(68.3)	22(81.5)	8(72.7)	.228	1.000	.298
LVEDV, ml
6 months	210.3 ± 118.8	183.0 ± 82.3	204.3 ± 98.1	327.2 ± 199.5	1.000	.001	.008
Δ	−42.7 ± 82.5	−54.2 ± 56.3	−38.6 ± 63.7	−9.8 ± 167.4	1.000	.347	.993
LVESV, ml
6 months	139.5 ± 94.4	118.6 ± 72.0	136.8 ± 85.2	224.3 ± 142.2	1.000	.002	0.022
Δ	−46.6 ± 64.7	−54.3 ± 47.3	−41.0 ± 53.6	−32.0 ± 125.3	1.000	.948	1.000
Relative change, %	−26.4 ± 30.7	−33.5 ± 23.7	−23.5 ± 33.2	−7.2 ± 40.5	.542	.033	0.387
LVEF, %
6 months	37.4 ± 11.8	39.1 ± 11.8	36.7 ± 12.8	32.9 ± 8.7	1.000	.373	1.000
Δ	10.1 ± 10.4	11.1 ± 10.0	9.5 ±11.8	7.6 ± 8.5	1.000	.948	1.000
PSD, degree
6 months	37.2 ± 21.6	28.1 ± 15.2	42.9 ± 22.2	57.9 ± 23.4	.010	< .001	.099
Δ	−13.1 ± 22.1	−17.8 ± 20.0	−10.4 ± 19.7	−1.8 ± 30.3	.561	.099	.841
PHB, degree
6 months	122.7 ± 78.9	88.2 ±51.3	140.4 ± 75.9	209.6 ± 93.5	.011	< .001	.018
Δ	−49.5 ± 86.1	−69.1 ± 78.5	−42.3 ± 75.6	5.6 ± 112.5	.648	.031	.355

NYHA, New York Heart Association; LVEDV, left ventricular end-diastolic volume; LVESV, left ventricular end-systolic volume; LVEF, left ventricular ejection fraction; PSD, phase standard deviation; PHB, phase histogram bandwidth

^*Recommended vs. non-recommended

^†Recommended vs. apex or scar

^‡non-recommended vs. apex or scar