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1.
J Endocrinol Invest ; 32(3): 267-71, 2009 Mar.
Article in English | MEDLINE | ID: mdl-19542747

ABSTRACT

UNLABELLED: Thyroglobulin (Tg) is a specific marker of residual thyroid cancer or tumor recurrence. In patients with elevated Tg levels and negative diagnostic radioiodine (131I) whole-body scans (dWBS), administration of a therapy dose may reveal foci that were not initially apparent. The aim of this study was to identify factors, other than 131I activity, which might explain why a post-therapy 131I whole-body scan is sometimes positive despite a negative dWBS. PATIENTS AND METHODS: We reviewed data on all patients with elevated Tg levels and negative dWBS with 185 MBq 131I off-T4 at followup, who subsequently received an empiric therapy dose of 3700 MBq of 131I. During a 5-yr period, 22 patients met these criteria. 131I therapy could be given immediately after negative dWBS in 9 patients, with an average of 8 extra days of hypothyroidism. In the other 13 patients, therapy was given an average of 8 months later. RESULTS: The therapy scan was negative in 16 patients, while it showed uptake in the thyroid bed in 5 patients and distant metastases in two. In the latter two patients, the TSH level was suboptimal at the time of dWBS (9 and 25 microIU/ml), and had risen to 34 and 70 microIU/ml respectively at the time of therapy. Overall, a positive scan following therapy occurred in 7 patients (6/9 patients treated immediately and 1/13 patients treated in a separate setting; p<0.01). In patients with positive therapy scans, the mean TSH level was 73 microIU/ml at the time of dWBS and 103.5 microIU/ml at the time of therapy (41% increase; p<0.05). In patients with negative therapy scans the mean TSH level was 84 microIU/ml at dWBS and 86 microIU/ml at the time of the therapy scan (2% increase). CONCLUSIONS: Our study suggests that interval increase in TSH level with a longer period of stimulation may have contributed to making the whole-body scan positive at the time of therapy. Nowadays, patients with elevated Tg are directly given a therapy dose of 131I. Special care should be taken when preparing patients who have been on suppressive levothyroxine therapy for a long time, in order to avoid misclassifying the tumor as non-functioning.


Subject(s)
Carcinoma, Papillary, Follicular/diagnostic imaging , Iodine Radioisotopes/therapeutic use , Thyroid Neoplasms/diagnostic imaging , Thyrotropin/blood , Adult , Carcinoma, Papillary, Follicular/blood , False Negative Reactions , Female , Follow-Up Studies , Humans , Male , Middle Aged , Radiography , Radionuclide Imaging , Retrospective Studies , Thyroid Neoplasms/blood , Whole Body Imaging
2.
Arch Mal Coeur Vaiss ; 100(3): 189-94, 2007 Mar.
Article in French | MEDLINE | ID: mdl-17536422

ABSTRACT

Becker's muscular dystrophy is an X-linked hereditary disorder characterised by progressive muscle weakness and possible cardiac disease. Cardiac involvement is assumed to be rare in young patients. Early diagnosis could lead to earlier treatment at an infra-clinical stage of the disease. The object of the study was to evaluate systolic and diastolic cardiac function of young patients with Becker's disease by echocardiography and using Doppler tissue imaging. Consecutive patients under 20 years of age with Becker's disease confirmed genetically were included and compared with paired normal subjects. Subendocardial and subepicardial myocardial velocities were obtained by Doppler tissue imaging and the corresponding velocity gradients were measured. Twelve patients were included (17.4 +/- 2.5 years). None of them had disabling muscle disease. No significant difference was observed from normal subjects with respect to: ventricular dimensions, wall thickness, fractional shortening, E/A ratio measured by transmitral Doppler. Nevertheless, patients with Becker's disease had lower systolic and diastolic intra-myocardial velocity gradients: 2.2 +/- 1.1 vs. 4.7 +/- 2.4 s(-1), p = 0.006, and 3.6 +/- 2.0 vs. 5.6 +/- 1.3 s(-1), p = 0.048, respectively, compared with the control group. These results show that myocardial disease is possible in patients with Becker's muscular dystrophy under the age of 20. Myocardial Doppler tissue imaging is a sensitive method for detecting these early abnormalities and should be recommended in the young patients.


Subject(s)
Cardiomyopathies/diagnosis , Echocardiography, Doppler , Muscular Dystrophy, Duchenne/complications , Adolescent , Adult , Blood Flow Velocity/physiology , Cardiomyopathies/diagnostic imaging , Case-Control Studies , Early Diagnosis , Echocardiography , Electrocardiography , Heart Ventricles/diagnostic imaging , Humans , Male , Mitral Valve/diagnostic imaging , Myocardial Contraction/physiology , Prospective Studies , Radionuclide Ventriculography , Stroke Volume/physiology
3.
Clin Exp Rheumatol ; 22(5): 609-16, 2004.
Article in English | MEDLINE | ID: mdl-15485015

ABSTRACT

OBJECTIVE: The aim of this international multicentric randomized phase 3 clinical trial was to compare prospectively radiosynoviorthesis (RSO) with rhenium-186-sulfide (186Re) to intra-articular corticotherapy in patients with clinically controlled rheumatoid arthritis (RA), but in whom one or a few medium-sized joints remained painful or swollen. METHODS: One hundred and twenty-nine joints in 81 RA patients [stratified into 2 groups: wrists (group 1, n = 78) and all the other joints (group 2, n = 51, including 18 elbows, 21 shoulders and 12 ankles)] were randomized to receive intra-articular injections of either 186Re-sulfide (64 +/- 4 MBq), or cortivazol (Altim) 3.75 mg. Clinical assessment was performed before and then at 3, 6, 12, 18 and 24 months after local therapy, using a 4-step verbal rating scale (VRS) and a 100 mm visual analog scale for pain, a 4-step VRS for joint swelling and mobility and a 2-step VRS for the radiological stage. The Mantel-Haenszel test was used for qualitative variables, analysis of variance (ANOVA) for quantitative pain analysis and Kaplan-Meyer survival test for relapse analysis. RESULTS: 186Re was observed to be statistically superior to cortivazol at 18 and 24 months while no statistical difference was seen for any criterion at 3, 6 and 12 months post injection. At 24 months, the difference in favor of 186Re was significant for pain (p = 0.024), joint swelling (p = 0.01), mobility (p = 0.05, non-wrists only), pain and swelling (p = 0.03) and pain or swelling (p = 0.02). "Survival" studies (Kaplan-Meyer) demonstrated a greater relative risk of relapse in corticoid treated joints, but only from the second year of follow-up. No serious side effect was observed in any patient, with only light and transient local pain and/or swelling occurring in 24% of cases, regardless of the treatment used. CONCLUSION: 186Re-sulfide and cortivazol had similar efficacy up to 12 months post-injection, but 186Re became clearly more effective at 18 and 24 months, for all criteria monitored and for RA outcome. Therefore, 186Re RSO can be recommended for routine clinical use.


Subject(s)
Antirheumatic Agents/therapeutic use , Arthritis, Rheumatoid/therapy , Pregnatrienes/therapeutic use , Radioisotopes/therapeutic use , Rhenium/therapeutic use , Adult , Female , Follow-Up Studies , Humans , Injections, Intra-Articular , Male , Middle Aged , Prospective Studies , Treatment Outcome
5.
Clin Exp Rheumatol ; 22(6): 722-6, 2004.
Article in English | MEDLINE | ID: mdl-15638046

ABSTRACT

OBJECTIVES: Intra-articular injection of 169Erbium-citrate (169Er-citrate; radiosynoviorthesis or radiosynovectomy) is an effective local treatment of rheumatic joint diseases. However, its efficacy in corticosteroid-resistant rheumatoid arthritis-affected joints has not been clearly demonstrated. METHODS: A double-blind, randomised, placebo-controlled, international multicentre study was conducted in patients with rheumatoid arthritis with recent (< or = 24 months) ineffective corticosteroid injection(s) into their finger joint(s). Eighty-five finger joints of 44 patients were randomised to receive a single injection of placebo (NaCl 0.9%) or 169Er-citrate. Results of evaluation 6 months later were available for 82 joints (46 metacarpophalangeal and 36 proximal interphalangeal joints) of 42 patients: 39 169Er-citrate-injected joints and 43 placebo-injected joints. Efficacy was assessed using a rating scale for joint pain, swelling and mobility. RESULTS: Intent-to-treat analysis of the results of the 82 joints showed a significant effect of 169Er-citrate compared to placebo for the principal criteria decreased pain or swelling (95 vs 79%; p = 0.038) and decreased pain and swelling (79 vs 47%; p = 0.0024) and for the secondary criteria decreased pain (92 vs 72%; p = 0.017), decreased swelling (82 vs 53%; p = 0.0065) and increased mobility (64 vs 42%; p = 0.036). Per-protocol analysis, excluding 18 joints of patients who markedly changed their usual systemic treatment for arthritis, gave similar percentages of improvement but statistical significance was lower owing the reduced power of the statistical tests. CONCLUSION: These results confirm the clinical efficacy of 169Er-citrate synoviorthesis of rheumatoid arthritis-diseased finger joints after recent failure of intra-articular corticotherapy.


Subject(s)
Arthritis, Rheumatoid/radiotherapy , Erbium/therapeutic use , Finger Joint/pathology , Radioisotopes/therapeutic use , Synovitis/radiotherapy , Adrenal Cortex Hormones/administration & dosage , Adult , Antirheumatic Agents/administration & dosage , Arthritis, Rheumatoid/drug therapy , Arthritis, Rheumatoid/pathology , Citric Acid/therapeutic use , Drug Resistance , Female , Humans , Injections, Intra-Articular , Male , Middle Aged , Prospective Studies , Synovitis/drug therapy , Synovitis/pathology , Treatment Failure
6.
Rev Med Interne ; 24(3): 151-7, 2003 Mar.
Article in French | MEDLINE | ID: mdl-12657436

ABSTRACT

PURPOSE: The aim of the study was to assess the place of cardiac Magnetic Resonance Imaging (MRI) in patients with sarcoidosis with or without cardiac involvement. MATERIALS AND METHODS: Fifty patients with histologically-proven sarcoidosis underwent initial cardiac evaluation including MRI, ECG, holter ECG, echocardiography. Seven of them had cardiac involvement (cardiac insufficiency, auriculo-ventricular block, bundle-branch block). Fiveteen patients had a second evaluation at 10-month follow-up. MRI was classified in three stages, on the base of literature data (stage 1 "granulomatous", stage 2 "exsudative", stage 3 "fibrotic"). RESULTS: A good correlation between the type of the sarcoidosis and MRI was observed: patients with cardiac involvement had all stage 2 MRI; patients with quiescent sarcoidosis had normal or stage 3 MRI; patients without cardiac involvement had all stages on MRI. A good correlation was observed between cardiac MRI abnormalities and evolution of sarcoidosis. Patients under corticoid, with or without cardiac involvement all had regression of MRI lesions and sarcoidosis. In 2 cases, MRI was predictive of clinical cardiac involvement. CONCLUSION: Cardiac MRI is a useful non-invasive method for the early diagnosis and follow-up of cardiac sarcoidosis.


Subject(s)
Cardiomyopathies/pathology , Magnetic Resonance Imaging , Sarcoidosis/complications , Adrenal Cortex Hormones/therapeutic use , Adult , Cardiomyopathies/diagnosis , Cardiomyopathies/etiology , Female , Humans , Male , Middle Aged , Retrospective Studies , Sarcoidosis/drug therapy
7.
Presse Med ; 32(6): 276-83, 2003 Feb 15.
Article in French | MEDLINE | ID: mdl-12610457

ABSTRACT

A NEW FORM OF MEDICAL IMAGING: Positron emission tomography (PET) is used for the non-invasive in vivo visualisation of biochemical cell processes. It reveals the metabolic characteristics of neoplastic lesions and hence their identification by compensating the lack of lesion specificity of radiological techniques. VARIOUS INDICATIONS: Using the current oncology marker, 18F-fluorodeoxyglucose (FDG), excellent results with PET have been established at all stages of neoplasia, notably for the diagnosis of initial malignancy and the identification of residual lesions and early detection of relapses. Moreover, the fact that the whole of the body can be explored makes PET the tool of choice in the control of the extension and operability of cancers. With the close correlation between imaging and the metabolism of the lesions, PET is the earliest and most precise for assessing the effects of treatment. LIMITS AND PERSPECTIVES: The existence of benign inflammatory FDG binding should lead to the development of markers of other metabolisms directly linked to cell proliferation. The lack of anatomical reference points characteristic of PET does not permit the precise localisation of the lesions detected and could be corrected by combining, in a single apparatus, the PET camera and an X scan, the anatomical resolution of which is irreplaceable. This type of equipment represents the development of a new branch of medical imaging, oncological imaging.


Subject(s)
Medical Oncology/trends , Neoplasm Recurrence, Local/diagnosis , Tomography, Emission-Computed , Diagnosis, Differential , Humans , Neoplasms/diagnostic imaging , Reference Values , Sensitivity and Specificity
8.
J Mal Vasc ; 28(5): 251-7, 2003 Dec.
Article in French | MEDLINE | ID: mdl-14978429

ABSTRACT

Cardiac markers are now considered as useful indexes for the diagnosis of myocardial ischemia and prediction of future events. Measurements of creatine kinase (CK) and MB enzymes have been considered as the gold standard in the past, but they lack sensitivity and specificity. Troponin has progressively gained acceptance as the new standard. Troponin assay is now widely available and several authors have demonstrated its diagnostic accuracy, predictive value, and capacity to predict prognosis and guide therapy in acute coronary artery disease. Further evaluations have however opened the perspective of more sensitive markers which may also exhibit more prompt elevation. B-type natriuretic peptide (BNP) is secreted during myocardial ischemia in response to increased overload pressure. BNP rises immediately after ischemic events and may be more sensitive than other cardiac markers, including troponin. Moreover, new techniques allow immediate determination. BNP therefore would be of great interest for the diagnosis and management of myocardial ischemia. New markers may allow determination of coronary plaque fissuring and detection of coronary disease at a preclinical phase.


Subject(s)
Coronary Artery Disease/blood , Acute Disease , Biomarkers/blood , Humans , Inflammation Mediators/blood , Natriuretic Peptide, Brain/blood , Pregnancy-Associated Plasma Protein-A/analysis , Prognosis , Troponin/blood
9.
Nucl Med Commun ; 22(4): 405-16, 2001 Apr.
Article in English | MEDLINE | ID: mdl-11338051

ABSTRACT

Physical and biological dosimetry were investigated in 45 rheumatoid arthritis patients treated by radiosynoviorthesis (RSO) with 186Re-sulphide (medium-sized joints) and 169Er-citrate (digital joints). Biological dosimetry involved scoring dicentrics in lymphocytes, cultured from blood samples withdrawn just before and 6 h, 24 h and 7 days after treatment. Physical methods included repeated blood sample counts and scintigraphy data. For erbium-169 (pure beta emitter), only bremsstrahlung could be measured and solely in the injection area. For rhenium-186 (both beta and gamma emitter), whole body scans and static images of joints and locoregional lymph nodes were performed. Dosimetry calculations were in accordance with the MIRDOSE 3 software and tables. For erbium-169 (21 patients), either metacarpophalangeal (30 MBq) or proximal interphalangeal (20 MBq) joints of the hands were treated (one joint per patient); 18 patients (out of 21) were interpretable for biological dosimetry, 10 (out of 11) for physical dosimetry and six (out of 10) for both. For rhenium-186, 23 wrists, nine elbows, three shoulders and two ankles were injected in 24 patients, with a maximum of three joints per patient (70 MBq per joint); 20 patients (out of 24) and 10 (out of 10) were interpretable for biological and physical dosimetry, respectively, and eight (out of 10) for both methods. Erbium-169 biological dosimetry was negative in all interpretable patients, and physical dosimetry gave a blood dose of 15 +/- 29 microGy and an effective dose lower than 1 mSv/30 MBq. For rhenium-186, biological results were negative in 16 patients (out of 20), but showed a blood irradiation around 200 mGy in the last four. A significant cumulative increase of dicentrics 7 days after injection (16/10,000 instead of 5/10,000 prior to treatment; p < 0.04) was also noted. Gamma counts gave a blood dose of 23.9 +/- 19.8 mGy/70 MBq and the effective dose was found to be 26.7 +/- 5.1 mGy/70 MBq, i.e. about 380 microGy.MBq-1. Erbium-169 RSO is very safe from both physical and biological dosimetry standpoints. Rhenium-186 leak is greater, as demonstrated by the higher blood activity and the measurable, although limited, dicentrics induction in blood lymphocytes. However, the effective dose remains moderate, i.e. 30 times lower than in 131I therapy in benign thyroid diseases.


Subject(s)
Arthritis, Rheumatoid/radiotherapy , Chlorides/therapeutic use , Erbium/therapeutic use , Radiopharmaceuticals/therapeutic use , Rhenium/therapeutic use , Adult , Arthritis, Rheumatoid/diagnostic imaging , Beta Particles , Chlorides/administration & dosage , Chlorides/pharmacokinetics , Data Interpretation, Statistical , Erbium/administration & dosage , Erbium/pharmacokinetics , Gamma Rays , Humans , Injections, Intra-Articular , Radionuclide Imaging , Radiopharmaceuticals/administration & dosage , Radiopharmaceuticals/pharmacokinetics , Radiotherapy Dosage , Rhenium/administration & dosage , Rhenium/pharmacokinetics , Sulfides , Tissue Distribution
10.
J Pediatr Gastroenterol Nutr ; 32(3): 278-86, 2001 Mar.
Article in English | MEDLINE | ID: mdl-11345176

ABSTRACT

BACKGROUND: The purpose of this study was to evaluate retrospectively the value of leukocyte-labeled scintigraphy, ultrasonography, and contrast radiography compared with endoscopy in children suspected of having inflammatory bowel disease (IBD). METHODS: Twenty-eight children (17 boys; mean age, 10.2 years) with IBD based on standard colonoscopic, histologic, and radiologic criteria (16 with Crohn's disease, 5 with ulcerative colitis, 5 with nonspecific colitis, I with granulomatous disease, and I with Beh,cet's disease) were included. Endoscopic, ultrasonographic, and contrast radiologic examinations were realized for 28, 23, and 19 children respectively. RESULTS: Sensitivity and specificity were 75% and 92% for leukocyte-labeled scintigraphy, 39% and 90% for ultrasonography, and 58% and 83% for contrast radiography. The authors noted discontinuous uptake for 14 of 15 true-positive results for patients with Crohn's disease and continuous uptake for 4 of 4 true-positive results for patients with ulcerative colitis. A negative correlation between scan activity index and Lloyd-Still clinical score was found for 11 patients with Crohn's disease (r = -0.77). CONCLUSIONS: Leukocyte-labeled scintigraphy, a noninvasive and reproducible technique, is a useful tool in the diagnosis and therapeutic strategy of IBD, and provides information on the presence, the intensity, and the extent of the disease, particularly in the terminal ileum. Leukocyte-labeled scintigraphy may not replace colonoscopy with biopsies for diagnosis confirmation. Its reliability seems higher than that of ultrasonography.


Subject(s)
Inflammatory Bowel Diseases/diagnosis , Radiopharmaceuticals , Technetium Tc 99m Exametazime , Adolescent , Barium Compounds , Child , Child, Preschool , Colitis, Ulcerative/diagnostic imaging , Colonoscopy , Crohn Disease/diagnostic imaging , Diagnosis, Differential , Female , Humans , Inflammatory Bowel Diseases/diagnostic imaging , Leukocytes , Male , Radiography , Radionuclide Imaging , Reproducibility of Results , Retrospective Studies , Sensitivity and Specificity , Ultrasonography
11.
J Clin Gastroenterol ; 31(2): 152-5, 2000 Sep.
Article in English | MEDLINE | ID: mdl-10993433

ABSTRACT

In Crohn's disease (CD), labeled leukocyte scintigraphy results are highly correlated with radioendoscopic findings and the degree of histologic inflammation. We evaluated the correlation between leukocyte activity measured by two complementary methods. polymorphonuclear leukocyte (PMN)-elastase concentration and leukocyte scintigraphy. In 20 patients with CD, labeled leukocytes, 99m technetium hexamethyl propylene amine oxime (99mTc-HMPAO) scintigraphy, and PMN-elastase concentration were evaluated on the same day. A good correlation was found between PMN-elastase concentrations and the scintigraphic scores (p = 0.005; rs = 0.60; 95% CI, 0.20-0.83). Scintigraphy results were significantly correlated with CD activity index (p = 0.023, rs = 0.50). In four patients, scintigraphic scores and clinical disease activity were not consistent due to the state of PMN leukocyte activation, measured by elastase concentration. In CD, PMN-elastase can provide information about the degree of activation of PMN leukocytes and may explain discrepancy between clinical and scintigraphic indexes.


Subject(s)
Crohn Disease/diagnosis , Leukocyte Elastase/blood , Leukocytes/diagnostic imaging , Neutrophils/enzymology , Radiopharmaceuticals , Technetium Tc 99m Exametazime , Adult , Aged , Blood Sedimentation , C-Reactive Protein/analysis , Cell Separation , Crohn Disease/blood , Crohn Disease/diagnostic imaging , Crohn Disease/enzymology , Data Interpretation, Statistical , Female , Humans , Immunoenzyme Techniques , Male , Middle Aged , Radionuclide Imaging
12.
Gastrointest Endosc ; 48(5): 491-6, 1998 Nov.
Article in English | MEDLINE | ID: mdl-9831837

ABSTRACT

BACKGROUND: Technetium Tc 99m hexamethyl propylene amine oxine (99mTc-HMPAO) has been used to radiolabel leukocytes with promising results for its clinical use in inflammatory bowel disease. During active ulcerative colitis, colonoscopy is indicated to determine the extent and the intensity of the disease for proper management. The aim of this prospective study was to determine whether 99mTc-HMPAO-labeled leukocyte scintigraphy can give information similar to that obtained with colonoscopy during acute attacks of ulcerative colitis. METHODS: Thirty-three consecutive patients with 50 acute episodes of ulcerative colitis underwent 99mTc-HMPAO scintigraphy and colonoscopy with biopsies. Scintigraphic determination of disease extent and intensity were compared with those obtained by colonoscopy with biopsies and clinicobiologic markers. RESULTS: The scintigraphic index of disease intensity was correlated with endoscopic index, Truelove index, biologic markers, and local release of interleukin-8. The extent measured by scintigraphy was well correlated to the endoscopic and histologic extent. CONCLUSIONS: 99mTc-HMPAO scintigraphy accurately determines the extent and the intensity of acute ulcerative colitis lesions. This noninvasive method can specify the extent and the intensity of an acute attack in patients with previously known ulcerative colitis.


Subject(s)
Colitis, Ulcerative/diagnostic imaging , Colonoscopy , Interleukin-8/metabolism , Leukocytes/diagnostic imaging , Radiopharmaceuticals , Technetium Tc 99m Exametazime , Adult , Biomarkers , Colitis, Ulcerative/metabolism , Colitis, Ulcerative/pathology , Female , Humans , Male , Prospective Studies , Radionuclide Imaging , Sensitivity and Specificity , Severity of Illness Index
13.
Acta Gastroenterol Belg ; 58(5-6): 353-63, 1995.
Article in French | MEDLINE | ID: mdl-8775991

ABSTRACT

99mTc-HMPAO leukocyte scintigraphy was prospectively studied in 20 patients with Crohn's Disease and was compared with radio-endoscopy and with disease activity index (Crohn's Disease Activity Index, ESR, C-reactive protein). Disease localization as defined by the scan was well correlated with those visualized at endoscopy or radiography (rs = 0.90 - p = 0.0001). A scan score was calculated by evaluating uptake of the tracer in 6 bowel segments with lumbar bone marrow activity, correlation with endoscopic score was strong (rs = 0.96 - p < 0.0001). Scan score was well correlated with the Crohn's Disease Activity Index (rs = 0.63 - p = 0.0026), but no correlation was found between ESR, C-reactive protein and scan score. In four patients with ileal localization, scintigraphy was helpful to separate inflammatory from scared stenosis. Scintigraphy with 99mTc-HMPAO appeared to be useful in evaluation of Crohn's Disease activity, and for the diagnosis of complications as stenosis.


Subject(s)
Crohn Disease/diagnostic imaging , Leukocytes , Organotechnetium Compounds , Oximes , Adult , Aged , Blood Sedimentation , C-Reactive Protein/analysis , Crohn Disease/diagnosis , Female , Humans , Male , Middle Aged , Prospective Studies , Radionuclide Imaging , Technetium Tc 99m Exametazime
14.
Neuromuscul Disord ; 3(5-6): 429-32, 1993.
Article in English | MEDLINE | ID: mdl-8186687

ABSTRACT

Golden Retriever dogs manifest an X-linked, Duchenne-like, muscular dystrophy with a characteristic lack of dystrophin. Histologic findings have demonstrated the cardiac involvement in these dogs to be a model for the cardiac insufficiency in human Duchenne muscular dystrophy (DMD). The goal of this study was to assess the capability of radionuclide angiography (RNA) as an assessment tool to measure the ventricular dysfunction in these dogs. Three dogs, one normal and two with muscular dystrophy (MD), were studied by equilibrium gated blood pool. Red blood cells were labelled with 420 MBq of 99mTc. The three dogs lying on their left sides on the table, received no drugs and were not restrained in any manner. RNA left ejection fraction (EF) and echographic measurements of left ventricular fractional shortening (FS) were performed during the same session. EF values were 61%, 48%, 36% and FS values were 47%, 32%, 26%, respectively, for the control dog, the 6 month old MD dog and the 12 month old MD dog. This preliminary study demonstrates the potential usefulness of RNA for the non-invasive follow-up exams of specific therapy in a canine model of muscular dystrophy.


Subject(s)
Gated Blood-Pool Imaging , Heart/diagnostic imaging , Muscular Dystrophy, Animal/physiopathology , Animals , Dogs , Dystrophin/deficiency , Dystrophin/genetics , Echocardiography/veterinary , Female , Gated Blood-Pool Imaging/veterinary , Heart/physiology , Heart/physiopathology , Humans , Male , Technetium
16.
Methods Find Exp Clin Pharmacol ; 13(7): 499-503, 1991 Sep.
Article in English | MEDLINE | ID: mdl-1784148

ABSTRACT

The McKenzie test is performed to compare the antiinflammatory activity of topical corticosteroids. Each drug induces a local whiteness of the skin called blanching. The blanchings are classically evaluated on the basis of visual score. This paper proposes a new blanching index and a methodology for designing such an index by digitizing and processing color slides. Several indices derived from classical color models are proposed and compared to the visual scores. This work demonstrates the significant improvement of quantitation derived from digitized images with respect to the observer assessment. The difference of chromatic green between the blanching patch and the surrounded healthy skin is proposed for analysis of the McKenzie test.


Subject(s)
Adrenal Cortex Hormones/pharmacology , Color Perception Tests/methods , Image Processing, Computer-Assisted/methods , Administration, Topical , Adult , Humans , Male , Middle Aged , Photography/methods , Skin/drug effects
17.
Ann Chir ; 45(7): 627-33, 1991.
Article in French | MEDLINE | ID: mdl-1755631

ABSTRACT

Lung transplantation has recently emerged as an efficient therapy for a variety of endstage pulmonary diseases. Nevertheless, many problems remain unsolved. A simple and reproducible experimental model allows examination of some of the problems encountered. We report here our experience of lung transplantation in the rat. One hundred and thirty six lung transplantations have been performed. After the initial phase necessary to master the technique, an overall survival rate of 86% was achieved. Graft function, as assessed by chest X-rays and lung isotope scans, was satisfactory up to 4 months after transplantation. Lung transplantation in the rat is a reliable and reproductible experimental model allowing the development of research projects in this field.


Subject(s)
Lung Transplantation/methods , Lung/diagnostic imaging , Animals , Lung/surgery , Lung Transplantation/mortality , Male , Pneumonectomy , Postoperative Care , Postoperative Complications , Radiography , Radionuclide Imaging , Rats
18.
Am J Cardiol ; 66(3): 289-95, 1990 Aug 01.
Article in English | MEDLINE | ID: mdl-2368673

ABSTRACT

To evaluate, in right ventricular (RV) myocardial infarction, the role of tricuspid regurgitation (TR) and left ventricular (LV) damage and the response to treatment of low cardiac output, 20 patients were prospectively studied. Volume infusion increased cardiac output only slightly (11%, p less than 0.001), despite a dramatic increase in ventricular filling pressures. Dobutamine (4 micrograms.kg-1.min-1) markedly increased cardiac output (24%, p less than 0.001) with a decrease in ventricular filling pressures. In the 5 patients with TR, dobutamine only modestly increased cardiac output (9 vs 26%, p less than 0.001), while stroke index and LV end-diastolic dimensions decreased in comparison (-5 vs 33% and -6 vs 9%, respectively, p less than 0.001). In the absence of TR (n = 15), there was no significant difference in response to volume expansion between patients with normal (n = 7) and depressed LV ejection fraction (n = 8). In contrast, dobutamine, in patients with depressed LV function, induced a greater increase in cardiac output (38 vs 17%, p less than 0.01) and RV ejection fraction (36 vs 12%, p less than 0.05). All patients with RV infarction-induced low cardiac output responded only modestly to volume loading. Dobutamine is particularly efficacious in patients without TR who have depressed LV function by improving RV function and, consequently, LV preload. In the 5 patients with TR, increasing RV contractility failed to improve the forward stroke volume by increasing the regurgitant fraction.


Subject(s)
Cardiac Output, Low/drug therapy , Dobutamine/therapeutic use , Heart Ventricles/pathology , Myocardial Infarction/complications , Tricuspid Valve Insufficiency/pathology , Adult , Aged , Analysis of Variance , Blood Volume/drug effects , Cardiac Output, Low/etiology , Cardiac Output, Low/mortality , Cardiac Output, Low/physiopathology , Echocardiography , Female , Heart Ventricles/physiopathology , Hemodynamics/drug effects , Humans , Male , Middle Aged , Prospective Studies , Thermodilution/methods , Tricuspid Valve Insufficiency/physiopathology
19.
Clin Pharmacol Ther ; 47(4): 483-9, 1990 Apr.
Article in English | MEDLINE | ID: mdl-2183960

ABSTRACT

In systemic sclerosis, abnormalities of myocardial perfusion are common and may be caused by a disturbance of the coronary microcirculation. We evaluated the long-term effect of captopril (75 to 150 mg per day) on thallium 201 myocardial perfusion in 12 normotensive patients with systemic sclerosis. Captopril significantly decreased the mean (+/- SD) number of segments with thallium 201 myocardial perfusion defects (6.5 +/- 1.9 at baseline and 4.4 +/- 2.7 after 1 year of treatment with captopril; p less than 0.02) and increased the mean global thallium score (9.6 +/- 1.7 at baseline and 11.4 +/- 2.1 after captopril; p less than 0.05). In a control group of eight normotensive patients with systemic sclerosis who did not receive captopril, no significant modification in thallium results occurred. Side effects with captopril included hypotension (six patients), taste disturbances (one patient), and skin rash (one patient). These side effects subsided when the dosage was reduced. These findings demonstrate that captopril improves thallium 201 myocardial perfusion in patients with systemic sclerosis and may therefore have a beneficial effect on scleroderma myocardial disease.


Subject(s)
Captopril/therapeutic use , Cardiomyopathies/drug therapy , Heart/diagnostic imaging , Scleroderma, Systemic/drug therapy , Thallium Radioisotopes , Adult , Captopril/adverse effects , Cardiomyopathies/diagnostic imaging , Cardiomyopathies/physiopathology , Coronary Circulation/drug effects , Female , Humans , Hypotension/chemically induced , Male , Microcirculation/drug effects , Middle Aged , Radionuclide Imaging , Scleroderma, Systemic/diagnostic imaging , Scleroderma, Systemic/physiopathology , Vasodilator Agents/therapeutic use
20.
J Cardiovasc Pharmacol ; 15(2): 249-53, 1990 Feb.
Article in English | MEDLINE | ID: mdl-1689420

ABSTRACT

Left ventricular dysfunction in systemic sclerosis may be due in part to myocardial ischemia caused by a disturbance in coronary microcirculation. We evaluated the pharmacodynamic effect of the calcium channel blocker nicardipine on left ventricular function assessed by radionuclide ventriculography in 20 patients with systemic sclerosis. Resting gated, blood-pool images were obtained at baseline and 90 min after 40 mg of oral nicardipine. The mean (+/- SEM) left ventricular ejection fraction significantly increased from 65.4 +/- 2.3% at baseline to 71.3 +/- 2.3% after nicardipine (p less than 0.005). The mean global defect score significantly decreased from 2.90 +/- 0.73 without nicardipine to 1.50 +/- 0.52 with nicardipine (p less than 0.01). The mean number of left ventricular sectors with severe hypokinesis significantly decreased from 0.80 +/- 0.24 at baseline to 0.20 +/- 0.09 after nicardipine (p less than 0.05). No significant side effects were observed with nicardipine. These results demonstrate short-term improvement in left ventricular function with nicardipine in patients with systemic sclerosis.


Subject(s)
Heart/drug effects , Nicardipine/therapeutic use , Scleroderma, Systemic/drug therapy , Adult , Aged , Female , Heart/diagnostic imaging , Heart/physiopathology , Heart Ventricles/drug effects , Heart Ventricles/physiopathology , Humans , Male , Middle Aged , Nicardipine/adverse effects , Radionuclide Ventriculography , Scleroderma, Systemic/diagnostic imaging , Scleroderma, Systemic/physiopathology
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