Table 1.

Comparison of patient LVEF values obtained by noninvasive (echocardiography and/or SPECT and invasive (angiography) studies within one month of each other.

Method A versus Method B	Number of Studies	LVEF, Method A (% ± S.E.)	LVEF, Method B (% ± S.E.)	Difference (% ± S.E.)	p-value
Echo versus Angio	202	49 ± 1.0	54 ± 1.0	−5 ± 0.8	<0.0001
SPECT versus Angio	542	49 ± 0.6	57 ± 0.6	−8 ± 0.5	<0.0001
Echo versus SPECT	201	49 ± 1.0	47± 1.0	+2 ± 0.8	0.0018

Angio: left ventricular contrast angiography; Echo: Two-dimensional echocardiography; LVEF: left ventricular ejection fraction; SPECT: electrocardiogram (ECG)-gated single photon emission computed tomography; S.E.: standard error