Assessment of right ventricular overload by a thallium-201 SPECT study in children with congenital heart disease.
Thallium-201 planar and SPECT studies were performed in 38 children with congenital heart disease using high-resolution three-headed SPECT. The 201Tl total or average right ventricular-to-left ventricular (RV/LV) count ratios were measured by summed short-axis images. In the planar study, the RV/LV systolic pressure ratio correlated with 201Tl RV/LV average count ratio (r = 0.91) better than that in the SPECT study (r = 0.78). However, in the SPECT study, patients with atrial septal defect (n = 9), ventricular septal defect (n = 13), tetralogy of Fallot and double outlet right ventricle (n = 6) showed a characteristic distribution in the plot of RV/LV pressure ratio versus 201Tl RV/LV total count ratio. A prospective study showed that the RV/LV average count ratio was a good predictor of RV/LV pressure ratio (n = 19, r = 0.91). Three-headed SPECT is useful for pediatric cardiac studies, and the overload types found in congenital heart disease seemed to be differentiated by the SPECT study.
Nakajima
K
K
Department of Nuclear Medicine, Kanazawa University Hospital, Japan.
Taki
J
J
Ohno
T
T
Taniguchi
M
M
Taniguchi
M
M
Bunko
H
H
Hisada
K
K
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004310:Double Outlet Right Ventricle / Q000000981:diagnostic imaging / Q000503:physiopathology; D005260:Female; D006330:Heart Defects, Congenital / Q000000981:diagnostic imaging* / Q000503:physiopathology; D006344:Heart Septal Defects, Atrial / Q000000981:diagnostic imaging / Q000503:physiopathology; D006345:Heart Septal Defects, Ventricular / Q000000981:diagnostic imaging / Q000503:physiopathology; D006801:Humans; D007223:Infant; D008297:Male; D011666:Pulmonary Valve Stenosis / Q000000981:diagnostic imaging / Q000503:physiopathology; D013771:Tetralogy of Fallot / Q000000981:diagnostic imaging / Q000503:physiopathology; D013794:Thallium Radioisotopes; D015899:Tomography, Emission-Computed, Single-Photon; D016278:Ventricular Function, Right / Q000502:physiology*
D013794:Thallium Radioisotopes