. Author manuscript; available in PMC: 2010 Nov 29.

Published in final edited form as: J Nucl Cardiol. 2010 May 4;17(5):811–816. doi: 10.1007/s12350-010-9238-y

Table 2.

Differences in LV dyssynchrony and function parameters between independently processed serial gated myocardial perfusion SPECT studies

N = 30	PSD	PHB	LVEF	LVESV	LVEDV
μ	1.79°	.00°	–.03%	3.10 mL	5.23 mL
σ	10.24°	28.55°	5.14%	13.06 mL	17.96 mL
P	.347	.988	.972	.204	.121
r	.915	.920	.970	.989	.982
CV	22.9%	20.0%	9.4%	8.5%	13.5%

PSD, Phase standard deviation; PHB, phase histogram bandwidth; LVEF, left ventricular ejection fraction; LVESV, left ventricular end-systolic volume; LVEDV, left ventricular end-diastolic volume.

μ = mean difference, σ = standard deviation of the difference, P < .05 = statistical significance by paired t test, r = correlation coefficient.

CV = average coefficient of variability. Coefficient of variability for each patient study was defined as the standard deviation of the measurements divided by the mean of the measurements. Here, CV is the average coefficient of variability in all 30 patients.