technetium-tc-99m-pyrophosphate and Kidney-Diseases

The purpose of this study was to examine the diagnostic value of planar. PYP images of 109 consecutive patients with suspected ATTR-CA were retrospectively reviewed. The myocardial PYP uptake was visually graded on a scale of 0 to 3 and quantified with the heart-to-contralateral (H/CL) ratio in accordance with the current expert consensus recommendations. The diagnostic value of planar images for identifying positive PYP SPECT was assessed by a receiver-operating characteristic curve analysis with the area under the curve (AUC). The uptake ratios of the ascending and descending aorta, left atrium, and trapezius muscle divided by the liver uptake were measured on SPECT images and compared to the renal function.. A total of 41 patients (38%) had myocardial PYP uptake on SPECT images. In comparison with the visual scores on 1-h anterior planar images, those on 3-h anterior planar images had lower sensitivity (80.5% vs. 97.6%) and higher specificity (86.8% vs. 55.9%) for identifying positive PYP SPECT. The ROC analysis showed that the combination of visual scores on both 1-h and 3-h anterior planar images had significantly higher AUC values in comparison with 1-h anterior planar images alone (0.90 [95% CI 0.83-0.94] vs. 0.83 [95% CI 0.75-0.88]; P < 0.001), which was comparable to the AUC values on 3-h anterior planar images alone (0.88 [95% CI 0.80-0.92]; P = 0.071). In comparison with visual scores on 1-h or 3-h anterior planar images alone, the combination of visual scores and H/CL ratio did not significantly improve the diagnostic value for identifying positive PYP SPECT (P = 0.73 and P = 0.50, respectively). The uptake ratios of ascending aorta/liver, descending aorta/liver, left atrium/liver, and trapezius muscle/liver were not significantly associated with the serum creatinine level or estimated glomerular filtration rate (P > 0.05 for all).. In the assessment of ATTR-CA using PYP imaging, visual scores on 3-h anterior planar images for identifying positive PYP SPECT had lower sensitivity and higher specificity in comparison with those on 1-h anterior planar images. The diagnostic value of the visual scores on 1-h and 3-h anterior planar images was not improved by adding the H/CL ratio. Blood pool activity of PYP was not significantly associated with renal dysfunction.

Topics: Amyloidosis; Cardiomyopathies; Diphosphates; Humans; Kidney Diseases; Prealbumin; Radionuclide Imaging; Radiopharmaceuticals; Retrospective Studies; Technetium Tc 99m Pyrophosphate; Tomography, Emission-Computed, Single-Photon

Topics: Amyloidosis; Cardiomyopathies; Echocardiography; Electrocardiography; Familial Mediterranean Fever; Female; Heart; Humans; Kidney Diseases; Kidney Failure, Chronic; Male; Nephrotic Syndrome; Proteinuria; Radionuclide Imaging; Technetium Tc 99m Pyrophosphate

The proposed method of sequential scintigraphy of the kidneys and joints in a single administration of 99mTc-pyrophosphate permits obtaining objective information on function and topography of the kidneys and pyodestructive processes in the joints. Dynamic scintigraphy helps to assess visually renal hemodynamics and the antomotopographic position of the kidney and to obtain exhaustive information on accumulative-evacuatory function of each kidney individually. Scintigraphy also helps to investigate all the joints and to detect pyoinflammatory changes in them. The proposed method considerably reduces the time of investigation and lessens radiation exposure of patients, permitting repeated investigations to assess and correct the treatment of patients with rheumatic arthritis.

Topics: Adult; Arthritis, Rheumatoid; Diphosphates; Evaluation Studies as Topic; Female; Humans; Joint Diseases; Joints; Kidney; Kidney Diseases; Male; Middle Aged; Radionuclide Imaging; Suppuration; Technetium; Technetium Tc 99m Pyrophosphate

10 patients with chronic renal failure (6 women, 4 men), 19 to 59 years of age, duration of the disease form 3 up to 21 years, treated by hemodialysis from 2 to 5 years, were examined. The scintigraphic examination of the bones with 99mTc pyrophosphate (166.5.10(6) MBq) on the third hour after the i.v. application of the radiocolloid, registered by the scanning device SELO-DS-2, allows the discovery of the initial changes of the so called renal osteodystrophy (bone disease in patients on chronic hemodialysis). The coefficient bones/soft tissues may be used as a quantitative index of the renal osteodystrophy in these patients whereas the coefficient calvaria/sternum has not the same diagnostic value.

Topics: Adolescent; Adult; Bone and Bones; Chronic Kidney Disease-Mineral and Bone Disorder; Diphosphates; Female; Humans; Kidney Diseases; Kidney Failure, Chronic; Male; Middle Aged; Radionuclide Imaging; Renal Dialysis; Technetium; Technetium Tc 99m Pyrophosphate