TABLE 1

Effect of Ventricle Caudal Angulation and Respiratory Amplitude on Inferior-to-Anterior and Anterior-to-Lateral Wall Ratios

201Tl wall ratioAmplitude (cm)Angle
15°30°45°
FBPACFBPACFBPAC
Inferior-to-anterior*00.97 ± 0.04†1.11 ± 0.07†‡0.78 ± 0.041.05 ± 0.080.72 ± 0.100.98 ± 0.13
10.94 ± 0.04†1.11 ± 0.04†‡0.80 ± 0.031.07 ± 0.06‡0.75 ± 0.110.92 ± 0.12
20.96 ± 0.07†1.22 ± 0.05†‡0.80 ± 0.061.07 ± 0.04‡0.69 ± 0.130.95 ± 0.16
Anterior-to-lateral§01.00 ± 0.071.10 ± 0.071.14 ± 0.071.11 ± 0.051.05 ± 0.071.05 ± 0.06
10.91 ± 0.080.88 ± 0.041.05 ± 0.071.01 ± 0.040.95 ± 0.070.92 ± 0.08
20.75 ± 0.050.74 ± 0.030.84 ± 0.060.78 ± 0.060.88 ± 0.060.80 ± 0.08

  • ↵* All inferior-to-anterior FBP vs. AC pairs, P < 0.002.

  • ↵† All inferior-to-anterior 15° vs. 45° pairs, P < 0.05.

  • ↵‡ Inferior-to-anterior AC vs. unity, P < 0.05.

  • ↵§ All anterior-to-lateral FBP vs. AC pairs, P = not significant.

  • ↵ All anterior-to-lateral 0-cm vs. 2-cm pairs, P < 0.001.

  • Data are expressed as mean ± 1 SD. Cold liver and spleen inserts were present. Respiratory pattern was normal respiration.