Article Figures & Data
Figures
- FIGURE 1.
Selection of region of interest in lateral free wall.
- FIGURE 2.
Correlation of RV/LV ratio with pulmonary artery (PA) systolic pressure in non–attenuation-corrected images.
- FIGURE 3.
Correlation of RV/LV ratio with right ventricular wall thickness in non–attenuation-corrected images.
- FIGURE 4.
Receiver operator analysis using RV/LV uptake ratio, on non–attenuation-corrected images, for detecting significant pulmonary hypertension.
- FIGURE 5.
Correlation of RV/LV ratio with pulmonary artery (PA) systolic pressure on attenuation-corrected images.
- FIGURE 6.
Correlation of RV/LV ratio with right ventricular wall thickness on attenuation-corrected images.
Tables
Characteristic Number History of pulmonary diseases 6 (18%) History of hypertension 23 (70%) History of diabetes mellitus 8 (24%) History of heart failure 13 (39%) Parameter Mean ± SD Range Estimated pulmonary artery systolic pressure (mm Hg) 42 ± 16 20–79 Right ventricular thickness (mm) 4.9 ± 1.1 2.5–7.3 Ejection fraction by echocardiography (%) 48 ± 19 10–75 Ejection fraction by SPECT (%) 55 ± 20 11–84 RV/LV uptake ratio (non–attenuation-corrected) 0.36 ± 0.1 0.22–0.74 RV/LV uptake ratio (attenuation-corrected) 0.47 ± 0.1 0.3–0.77 - TABLE 3
Sensitivity and Specificity of RV/LV Ratio for Detection of Significant Pulmonary Hypertension
RV/LV ratio Sensitivity Specificity Positive likelihood ratio 0.30 85% 32% 1.25 0.35 72% 70% 2.4 0.38 64% 90% 6.4 0.4 64% 95% 12.8 - TABLE 4
RV/LV Uptake Ratio Among Patients with Abnormal and Normal Estimated Systolic Pulmonary Artery Pressures
Parameter Significant elevation (estimated PAP ≥ 40 mm Hg) No significant elevation (estimated PAP < 40 mm Hg) P RV/LV uptake ratio (non–attenuation-corrected) 0.43 ± 0.12 0.32 ± 0.05 0.002 RV/LV uptake ratio (attenuation-corrected) 0.5 ± 0.09 0.45 ± 0.11 0.2 PAP = pulmonary artery pressure.
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