. Author manuscript; available in PMC: 2014 Mar 1.

Published in final edited form as: Circ Cardiovasc Imaging. 2013 Feb 11;6(2):195–201. doi: 10.1161/CIRCIMAGING.112.000132

Table 2.

^99mTc-PYP SPECT data according to amyloid subtype

Category	AL n=12	ATTRwt n=16	ATTRm n=17	P value
Semi-quantitative Visual Cardiac Score (%)
Score <2	83	0	6	<0.0001
Score ≥2	17	100	94
Quantitative Cardiac Score (cts)
Heart absolute cts	21.8±2.7	27.7±0.9	30.4±3.6	0.10
CL absolute cts	18.1±2.2	15.3±0.6	17.5±2.4	0.48
H/CL ratio	1.21±0.04	1.84±0.06^a	1.77±0.06^a	<0.0001
Heart SD mean cts	5.4±0.3	6.5±0.2	6.7±0.5^a	0.033
CL SD mean cts	4.4±0.3	4.6±0.1	4.7±0.4	0.73
Heart mean max cts/pix	40.2±3.7	52.0±1.8	54.2±4.8^a	0.041
CL mean max cts/pix	35.3±3.1	34.6±0.8	35.5±3.2	0.88
Heart mean total cts/ROI	38,966±4,528	60,709±4,423^a	58,346±4,764^a	0.008
CL mean total cts/ROI	32,132±3,591	33,904±1,724	35,285±3,140	0.72
Heart mean area ROI (mm²)	4,672±417	5,356±302	5,303±336	0.36
CL mean area ROI (mm²)	4,619±412	5,295±298	5,262±342	0.36

Continuous data are expressed as mean± SE, and categorical data are expressed as percentages.

Semi-quantitative and quantitative data were obtained 1 hour post ^99mTc-PYP infusion.

Cts indicates counts; CL, contralateral; SD, standard deviation; Pix, pixels; ROI, region of interest.

P<0.05 by ANOVA with Bonferroni correction in comparison to AL.