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Pedrini L, Dondi M, Magagnoli A, Magnoni F, Pisano E, Del Giudice E, Santoro M. Evaluation of thrombogenicity of fluoropassivated polyester patches following carotid endarterectomy. Ann Vasc Surg 2001; 15:679-83. [PMID: 11769150 DOI: 10.1007/s100160010129] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The use of a patch after carotid endarterectomy (CE) is recommended to reduce the incidence of restenosis. Most studies on this subject report the implantation of saphenous vein or PTFE patches, because polyester has always been considered to be a thrombogenic material. The purpose of this study was to evaluate the thrombogenicity of a knitted polyester patch passivated by fluoropolymer surface treatment (FPD patch), which experimental studies have demonstrated to be less thrombogenic than other materials. This prospective, randomized study was performed in 22 patients who underwent CE. In 11 patients the arteriotomy was sutured directly, while in the other 11 an FPD patch was applied. Patients' 111in-oxine labeled platelets were reinjected on the first postoperative day, and scintigraphies were performed after 4, 24, and 48 hr, respectively. The study confirmed that an FPD patch is no more thrombogenic than a simple carotid endarterectomy. The application of the patch, therefore, can be recommended to reduce restenosis without any adjunctive thromboembolic risk.
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dell'Erba L, Baldari S, Borsato N, Bruno G, Calò-Gabrieli G, Carletto M, Ciampolillo A, Dondi M, Erba P, Gerundini P, Lastoria S, Marinelli P, Santoro M, Scarano B, Zagni P, Bagnasco M, Mariani G. Retrospective analysis of the association of nodular goiter with primary and secondary hyperparathyroidism. Eur J Endocrinol 2001; 145:429-34. [PMID: 11581000 DOI: 10.1530/eje.0.1450429] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND The association of hyperparathyroidism (HPT) with thyroid disease has long been known, but the mechanisms underlying such an association have not yet been clarified. OBJECTIVE To elucidate the main factors determining this combination of endocrine diseases, in a retrospective multicenter study. METHODS We retrospectively reviewed all patients referred for parathyroid scintigraphy in the period 1990-1999. A total of 487 patients in the age range 17-65 years were selected for the analysis (339 women and 148 men); group A included 241 patients with primary and group B 246 patients with secondary HPT. RESULTS A total of 124/241 patients in group A (51.5%), but only 92/246 patients in group B (38.2%) had thyroid disorders (notably nodular goiter) associated with HPT (P=0.0035). Thyroid disorders were evenly distributed throughout the entire 17-65 years age range in group A, but 17-40-year-old patients in group B had significantly fewer thyroid disorders than the older patients of the same group (15.5% compared with 43.3%, P<0.002), as expected in a general population. In patients with primary HPT there was no difference in the prevalence of thyroid disease between women and men, whereas the ratio of women to men in secondary HPT patients with thyroid disease was about 3:1. CONCLUSIONS These results demonstrate an increased prevalence of nodular goiter in patients with primary rather than secondary HPT, and are consistent with a possible role of increased endogenous calcium concentrations (a hallmark of primary, but not of secondary, HPT) as a goitrogenic factor in patients with HPT.
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De Stefanis A, Dondi M, Perez G, Tomlinson AA. Decomposition of nitrous oxide on pillared clays. CHEMOSPHERE 2000; 41:1161-1165. [PMID: 10901241 DOI: 10.1016/s0045-6535(00)00027-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Alumina-pillared smectites have been found to abate nitrous oxide in the presence of methane. The results indicate that the yield of the reaction (N20 --> N2 + (1/2)O2) increases when pillared clays are exchanged with transition metals, single-pass conversion rates of >70% being attainable. In particular, when double exchanged (calcium and subsequently copper) alumina pillared montmorillonite/beidellite is used as a catalyst, de-N2O activity reaches a maximum, which is maintained even after 4 h of work at a space velocity of 5.5 h(-1). A mechanism for the reaction is suggested, which implies that N2O is first adsorbed by the catalyst and then decomposes through two different paths: catalyst oxidation and catalyst reduction. Such a redox process explains the kinetic data.
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Dondi M, Flieger M, Olsovska J, Polcaro CM, Sinibaldi M. High-performance liquid chromatography study of the enantiomer separation of chrysanthemic acid and its analogous compounds on a terguride-based stationary phase. J Chromatogr A 1999; 859:133-42. [PMID: 10574206 DOI: 10.1016/s0021-9673(99)00872-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The direct enantioseparation of chrysanthemic acid [2,2-dimethyl-3-(2-methylpropenyl)-cyclopropanecarboxylic acid] and its halogen-substituted analogues was systematically studied by HPLC using a terguride-based chiral stationary phase in combination with a UV diode array and chiroptical detectors. Isomers with (1R) configuration always eluted before those with (IS) configuration. The elution sequence of cis- and trans-isomers was strongly affected by mobile phase pH, whereas the enantioselectivity remained the same. Conditions for the separation of all the enantiomers were also examined. This method was used for monitor the hydrolytic degradation products of Cyfluthrin (Baythroid) in soil under laboratory conditions.
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Dondi M, Simion F, Caltran G. Can newborns discriminate between their own cry and the cry of another newborn infant? Dev Psychol 1999. [PMID: 10082012 DOI: 10.1037//0012-1649.35.2.418] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Two experiments were conducted to test whether newborns could discriminate between their own cry and the cry of another newborn infant. Facial behavior and nonnutritive sucking rate were adopted as dependent measures. In Experiment 1, 20 newborns in an awake state were presented with either their own cry or the cry of another infant. In the latter condition, newborns showed the facial expression of distress more frequently and for a longer duration. In addition, the rate of sucking decreased significantly between the pretest phase and the 1st min of presentation of another infant's cry. Newborns' responses, although delayed and less intense, showed a similar trend in Experiment 2, during which 20 newborns in a sleep state were tested with the same procedure. These results indicate the newborns' capability to discriminate between the 2 cry stimuli and show the effectiveness of a newborn cry in inducing distress signals in another newborn infant.
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Dondi M, Simion F, Caltran G. Can newborns discriminate between their own cry and the cry of another newborn infant? Dev Psychol 1999; 35:418-26. [PMID: 10082012 DOI: 10.1037/0012-1649.35.2.418] [Citation(s) in RCA: 137] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Two experiments were conducted to test whether newborns could discriminate between their own cry and the cry of another newborn infant. Facial behavior and nonnutritive sucking rate were adopted as dependent measures. In Experiment 1, 20 newborns in an awake state were presented with either their own cry or the cry of another infant. In the latter condition, newborns showed the facial expression of distress more frequently and for a longer duration. In addition, the rate of sucking decreased significantly between the pretest phase and the 1st min of presentation of another infant's cry. Newborns' responses, although delayed and less intense, showed a similar trend in Experiment 2, during which 20 newborns in a sleep state were tested with the same procedure. These results indicate the newborns' capability to discriminate between the 2 cry stimuli and show the effectiveness of a newborn cry in inducing distress signals in another newborn infant.
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Taylor AT, Fletcher JW, Nally JV, Blaufox MD, Dubovsky EV, Fine EJ, Kahn D, Morton KA, Russell CD, Sfakianakis GN, Aurell M, Dondi M, Fommei E, Geyskes G, Granerus G, Oei HY. Procedure guideline for diagnosis of renovascular hypertension. Society of Nuclear Medicine. J Nucl Med 1998; 39:1297-302. [PMID: 9669414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
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Volpi N, Dondi M, Bolognani AM. Characterization of a small chondroitin sulfate proteoglycan isolated from the mucus surrounding the embryos of Viviparus ater (Mollusca Gastropoda). BIOCHIMICA ET BIOPHYSICA ACTA 1998; 1380:239-48. [PMID: 9565694 DOI: 10.1016/s0304-4165(97)00146-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A small chondroitin sulfate proteoglycan was isolated and partially characterized for core protein and glycosaminoglycan structures from the mucus surrounding embryos in the developmental pouch of Viviparus ater (Mollusca Gastropoda). The protein bearing polysaccharide nature was confirmed by gel-permeation chromatography separation of fractions positive to the uronic acid dosage, 7.5% SDS-PAGE under reducing conditions, sequential staining with alcian blue and ammoniacal silver. Its molecular mass was calculated at about 228,800. After degradation of the galactosaminoglycan components by chondroitinase ABC in the presence of proteinase inhibitors, the molecular mass of the core protein was determined at about 72,200. Treatment of the proteoglycan with keratanase did not modify its electrophoretic migration. Isoelectric focusing of the core protein demonstrated a micro-heterogeneity with the presence of two isoforms with different isoelectric point, pI=8.2 and 6.6, in a ratio of about 1:2.2. The glycosaminoglycan component of the proteoglycan was characterized as chondroitin sulfate with a molecular mass of about 30,750 composed of 5% non-sulfated unsaturated disaccharide, 94% monosulfated disaccharides (4-monosulfated to 6-monosulfated disaccharide ratio of 1.36) and 1. 5% disulfated disaccharides (in particular 1.3% 2,6-disulfated disaccharide) with a sulfate to carboxyl ratio of 0.96. Degradation of the chondroitin sulfate with chondroitinase ABC and ACII permitted to determine a percentage of glucuronic acid of about 78.4. The proteoglycan isolated from the mucus surrounding the embryos of Viviparus ater is formed by a small core protein bearing about five chondroitin sulfate chains (80% chondroitin sulfate/20% dermatan sulfate) with potential function in the developmental processes of molluscs embryos.
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Dondi M. Use of zirconium oxychloride to neutralize HF in the microwave-assisted acid dissolution of ceramic glazes for their chemical analysis by ICP-OES. Talanta 1998; 45:1201-10. [DOI: 10.1016/s0039-9140(97)00227-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/1997] [Revised: 07/16/1997] [Accepted: 07/17/1997] [Indexed: 10/18/2022]
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Ascari A, Dondi M, Gariboldi G. MAIA project: software for the management of toxicodependence treatment process. Subst Use Misuse 1998; 33:657-67. [PMID: 9533734 DOI: 10.3109/10826089809115889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This chapter reviews the importance of information management in a therapeutic community, how to select the data collected by the interview and features of the software and its fitting in an operative context. New sections are projected to help staff who diagnose treatment candidates and treat patients. Use of statistical analysis as an instrument for management of therapeutic communities is based on the experience of "Centro Solidarietà di Modena". Some examples are included on the population of "Centro Solidarietà di Modena". Artificial neural networks have a viable role for treatment (primary, secondary and tertiary).
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Taylor A, Nally J, Aurell M, Blaufox D, Dondi M, Dubovsky E, Fine E, Fommei E, Geyskes G, Granerus G, Kahn D, Morton K, Oei HY, Russell C, Sfakianakis G, Fletcher J. Consensus report on ACE inhibitor renography for detecting renovascular hypertension. Radionuclides in Nephrourology Group. Consensus Group on ACEI Renography. J Nucl Med 1996; 37:1876-82. [PMID: 8917196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
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Dondi M, Fanti S, Monetti N. Bartter's syndrome: renal scintigraphic appearance after captopril administration. J Nucl Med 1996; 37:1688-90. [PMID: 8862312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
We report a case of Bartter's syndrome, a rare disease characterized by hypokalemia, increased plasma renin and angiotensin II levels with normal blood pressure. During the diagnostic work-up, the patient had renal scintigraphy in baseline and after captopril administration. Pharmacological blockade of the renin-angiotensin system with captopril resulted in bilateral and symmetrical renal abnormalities (increase of parenchymal transit time, time to maximum activity and retained cortical activity, with cortical trapping of the radiopharmaceutical). Baseline scintigraphy was normal. The findings are consistent with Bartter's syndrome pathogenesis. Captopril renography may be useful to differentiate Bartter's syndrome from other covert causes of hypokalemia.
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Dondi M, Fanti S. Determination of individual renal function through noninvasive methodologies. Curr Opin Nephrol Hypertens 1995; 4:520-4. [PMID: 8591062 DOI: 10.1097/00041552-199511000-00012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Radioactive tracers provide a unique means of determining individual renal function and are therefore to be preferred for obtaining accurate information on the functional status of each kidney. New applications of computed tomography and magnetic resonance imaging appear promising, but results from large studies are not available to confirm their potential role.
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Sandrini M, Vitale G, Dondi M, Pini LA. Effects of acetylsalicylic acid on serotonin brain receptor subtypes. GENERAL PHARMACOLOGY 1995; 26:737-41. [PMID: 7635248 DOI: 10.1016/0306-3623(94)00252-i] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
1. The lysine salt of acetyl salicylic acid (ASA) at a dose equivalent to 400 mg/kg of acetyl salicylic acid (ASA) was intraperitoneally administered in rats. 2. After 30 and 120 min ASA did not modify the number of receptors nor the affinity of [3H] 8-OH-DPAT binding sites in pons and cerebral cortex. On the other hand, the receptor number in the cortex membranes decreased significantly using [3H] ketanserin as ligand, while the receptor number in the pontine membranes did not change. 3. These data support the involvement of central 5-HT receptors in the mode of action of ASA.
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Inglese E, Brambilla M, Dondi M, Pieri P, Bisi G, Sara R, Cannizzaro G, Cappagli M, Giordano A, Moscatelli G. Assessment of myocardial viability after thallium-201 reinjection or rest-redistribution imaging: a multicenter study. The Italian Group of Nuclear Cardiology. J Nucl Med 1995; 36:555-63. [PMID: 7699441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
UNLABELLED To establish the real nature of 201Tl defects in the assessment of myocardial viability (e.g., fixed versus reversible), 201Tl reinjection was evaluated in a multicenter trial involving 402 consecutive patients with ischemic heart disease and exercise 201Tl defects. METHODS Twelve hospitals, using the same type of gamma camera and computer software, adopted one of the two most widely used reinjection protocols. In 230 patients (Group A), reinjection was performed immediately after stress-redistribution planar imaging; in 172 patients (Group B), reinjection was performed on a separate day and followed by rest-redistribution imaging. The images were interpreted by three blinded observers in a core laboratory on a five-point qualitative scale; the reproducibility in visual scoring was excellent. RESULTS Groups A and B had a similar prevalence of myocardial segments with abnormal uptake at stress (39%, 40%), as well as with reversible (16%, 17%), partially reversible (21%, 19%) and irreversible (63%, 64%) defects at redistribution. After reinjection, 201Tl uptake improved in 27% and 36% of both partially reversible and irreversible defects in Groups A and B. No differences were found when comparing early and delayed reinjection imaging in Group B. CONCLUSION This study confirms the validity of 201Tl reinjection in a large, unselected population, but the discordance with stress/redistribution is less than has been previously reported for both 201Tl reinjection protocols, the prevalence of improved segments after reinjection was higher with the separate day approach.
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Fanti S, De Fabritiis A, Aloisi D, Dondi M, Marengo M, Compagnone G, Fallani F, Cavalli A, Monetti N. Early pulmonary involvement in systemic sclerosis assessed by technetium-99m-DTPA clearance rate. J Nucl Med 1994; 35:1933-6. [PMID: 7989973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
UNLABELLED Systemic sclerosis (SS) is frequently associated with interstitial lung disease, but clinical symptoms and radiologic abnormalities may occur late in the course of the disease. This study investigated early pulmonary involvement by assessing the clearance rate of inhaled 99mTc-diethylenetriaminepentaacetic acid (DTPA). METHODS Sixteen patients with proved SS, no clinical pulmonary symptoms and normal chest radiogram were prospectively studied. The 99mTc-DTPA clearance rate was calculated as the time to half clearance (T1/2) and compared with values obtained in healthy nonsmokers. RESULTS Six patients showed abnormally increased clearance (T1/2 < 53 min). Rapid clearance was not correlated to SS disease duration or to abnormal pulmonary function tests. Five of six patients with abnormally increased clearance underwent high-resolution CT, which in all five demonstrated pathologic findings that were suggestive of early interstitial disease. CONCLUSION These findings indicate that in SS asymptomatic patients may frequently present with abnormal 99mTc-DTPA clearance; 99mTc-DTPA lung scintigraphy may allow early detection of subclinical pulmonary involvement in SS.
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Brambilla M, Inglese E, Cannizzaro G, Dondi M, Sara R, Arrigo F, Tarolo GL. A multicenter trial on interobserver and intraobserver reproducibility of segmental scoring of thallium-201 planar myocardial imaging before and after reinjection. Italian Group of Nuclear Cardiology. J Nucl Med 1994; 35:601-8. [PMID: 8151382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
UNLABELLED Inter- and intraobserver reproducibility (R) of segmental 201Tl scores after stress (ST), redistribution (RD) and reinjection (RI) planar imaging were evaluated. METHODS Images were examined from 396 patients with suspected coronary artery disease, demonstrated by means of post-ST imaging of at least one perfusion defect. To eliminate external sources of variability, the same gamma camera, acquisition protocol and computer software were used in this multicenter study. Thallium-201 images of the anterior, left anterior oblique and left lateral projections were obtained immediately, 4 hr after exercise and 30 min after the injection of additional 201Tl either on the same day or on a different day. The left ventricle was divided into 15 segments and evaluated by three independent observers, blinded to clinical data, according to a five-point scale. RESULTS The R score for ST, RD and RI images, expressed as an intraclass correlation coefficient, was 0.76, 0.74 and 0.72, respectively. After averaging multiple observer scores, R increased to 0.91, 0.90 and 0.89, respectively. Individual observer measurement of the R score was 0.48, 0.51 and 0.32 for ST-RD, ST-RI and RD-RI image pairs, respectively, and multiple observer scores showed R increases to 0.74, 0.76 and 0.58. CONCLUSION This qualitative scale reliably assesses the severity of 201Tl perfusion defects, particularly when multiple-observer scores are averaged. Individual observer change scores should be taken with great caution, especially in studies involving the visual evaluation of RD-RI image changes.
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Dondi M, Fanti S, Monetti N. Captopril renal scintigraphy: a viewpoint. JOURNAL OF NUCLEAR BIOLOGY AND MEDICINE (TURIN, ITALY : 1991) 1993; 37:259-263. [PMID: 8172970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Fanti S, Dondi M, Corbelli C, Zagni P, Bellanova B, Franchi R, Levorato M, Fallani F, Marengo M, Fagioli G. Evaluation of hypertensive patients with a solitary kidney using captopril renal scintigraphy with 99Tcm-MAG3. Nucl Med Commun 1993; 14:969-75. [PMID: 8290169 DOI: 10.1097/00006231-199311000-00006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The study aimed to evaluate the safety and reliability of captopril renal scintigraphy (CRS) for diagnosing functionally significant renal artery stenosis (RAS) in hypertensive patients with a solitary kidney. Radionuclide studies were carried out using 100 MBq 99Tcm-mercaptoacetyl triglycine (MAG3), 1 h after administration of 50 mg captopril, and repeated in baseline condition when abnormalities were observed in the provocative study. Scintigraphic diagnosis of RAS was based on analysis of captopril-induced changes of the radiorenographs. Overall, 12 patients with a solitary kidney were investigated, and scintigraphic results compared to angiographic findings. All five patients with positive CRS showed an RAS > 50%, whereas only one of the seven patients with negative CRS was affected by RAS. A significant fall in mean arterial pressure was recorded after captopril administration (123 +/- 12 mm Hg before versus 108 +/- 11 after), but no serious side effects were observed. Our results demonstrate that captopril-induced modifications of the renogram could effectively be used to diagnose the presence of RAS. Captopril renal scintigraphy may therefore be suggested as a reliable and safe noninvasive approach to evaluate hypertensive patients with a solitary kidney.
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Dondi M, Tartagni F, Osele L, Fanti S, Monetti N, Antonioli P, De Tommaso I, Franchi R, di Niro MR, Magnani B. [Identification of viable myocardium by 201Tl scintigraphy: a comparison of methods]. Nuklearmedizin 1993; 32:194-9. [PMID: 8372001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The present study was undertaken to compare four different imaging approaches to evaluate uptake defect reversibility. 24 infarcted patients underwent standard stress/redistribution 201Tl imaging (R1). Then, after reinjection of 37 MBq of 201Tl, patients were re-imaged either after 15 min (R2) 24 h later (R3). A separate rest study (R4) following a new tracer injection was done within 2-3 days. Planar images were obtained in the standard three views and subdivided into 216 segments for qualitative analysis based on a visual score. A semiquantitative analysis based upon circumferential profiles was also applied. A stress defect was found in 127 segments (58.7%). By visual inspection reperfusion was considered to occur in 32.3%, 41.7%, 33.0% and 49.6% of the cases with R1, R2, R3, and R4, respectively. The semiquantitative method showed a high reperfusion only with R1 (62%), while the other procedures proved less effective. No improvement was found with R4. Six patients (25%) showed myocardial viability that was not detected with the early reinjection technique.
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Fanti S, Dondi M, Corbelli C, Monetti N. Diagnosis of renovascular hypertension with captopril renal scintigraphy in a patient with a solitary kidney. J Nucl Med 1993; 34:1166-8. [PMID: 8315496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
A patient with a solitary kidney due to renal agenesis and contralateral kidney perfusion impairment due to renal artery stenosis was successfully treated with percutaneous transluminal renal angioplasty. Preintervention diagnostic work-up included captopril renal scintigraphy, which was suggestive of high probability of renovascular hypertension. Scintigraphic assessment 2 mo after angioplasty failed to show any abnormality after captopril administration, a finding in line with blood pressure beneficial response to renal artery revascularization. A 12-mo follow-up confirmed cure of hypertension.
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Pavlica P, Barozzi L, Viglietta G, Losinno F, Dondi M, De Fabritiis A, Amato A, Zuccala A. [Color-Doppler and angioplasty in renovascular hypertension]. LA RADIOLOGIA MEDICA 1993; 85:60-7. [PMID: 8332815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Renovascular hypertension is defined as a kind of hypertension secondary to altered renal perfusion with the activation of the renin-angiotensin system. Since a large number of these patients benefits from treatment--be it medical, surgical or angioplastic--a non-invasive low-cost method allowing accurate screening was looked for. Color-Doppler was employed by many authors to evaluate renovascular hypertension, for both the early diagnosis of the condition and the evaluation of treatment results in renal artery stenoses. However, the authors agree that color-Doppler cannot play a major role in the screening of renovascular hypertension due to the various qualitative and quantitative variables not being adequately codified, to the lack of a single color-Doppler method and to the difficult comparison of the results from the different units. Nevertheless, improved results are promised by technological evolution, together with the possibility to codify color-Doppler variables more easily repeatable. B-mode units with 3.5 and 5 MHz probes were employed in the thinnest subjects. In 5-25% of cases accessory renal arteries were observed. After identifying the vessel to be studied with several spatial scans, the smallest possible sample volume (usually 3-5 mm) was positioned. The normal flowmetric range was 0.07-0.1 s: it must not exceed 0.16 s, with persistence of high diastolic flow. Some authors' criteria were followed to define either stenosis or renal artery obstruction; moreover, pulsatile flow index was considered, together with the resistive index, pulsatility index and stenosis index.
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Dondi M, Fanti S, Monetti N. 132. Diagnosis of renovascular hypertension by means of Captopril renal scintigraphy (CRS) in patients with a solitary kidney. Nucl Med Commun 1993. [DOI: 10.1097/00006231-199304000-00134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Dondi M, Tartagni F, Fallani F, Fanti S, Marengo M, DiTommaso I, Zheng QF, Monetti N. A comparison of rest sestamibi and rest-redistribution thallium single photon emission tomography: possible implications for myocardial viability detection in infarcted patients. EUROPEAN JOURNAL OF NUCLEAR MEDICINE 1993; 20:26-31. [PMID: 8420779 DOI: 10.1007/bf02261242] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Thirty patients (26 men, 4 women, mean age 61 +/- 8 years) who had suffered myocardial infarction 15 +/- 6 months previously, were submitted to (1) standard stress-redistribution thallium-201 single photon emission tomography (SPET), (2) rest-redistribution 201T1 SPET and (3) stress-rest technetium-99m sestamibi SPET. Uptake modifications in relation to exercise-induced defects were evaluated in a total of 390 myocardial segments. Tracer uptake was scored as normal (=0), mildly reduced (=1), apparently reduced (=2), severely reduced (=3) or absent (=4). Comparison of stress studies failed to show any statistical difference (58% segmental abnormalities with sestamibi vs 61% with thallium). Uptake abnormalities (score 1-4) were detected in 55% of the segments with sestamibi, 55% with standard thallium redistribution, 55% with early imaging after thallium injection at rest and 54% with 3-h delayed rest imaging (P = NS). Absence of tracer uptake (score = 4) under resting conditions was recorded in 75 (19%) segments with standard 201T1 redistribution, 75 (19%) with rest sestamibi, 70 (18%) with rest 201T1 imaging and 62 (16%) with rst-redistribuion 201T1 (P < 0.05 vs other imaging modalities). Thus, 3-h delayed rest thallium imaging detected reversibility of uptake defects in a significantly higher number of myocardial segments. This finding might have important implications for both tracer and technique selection when myocardial viability is the main clinical issue.
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Dondi M, Tartagni F, Fanti S, Monetti N, Antonioli P, De Tommaso I, Franchi R, di Niro MR, Magnani B, Zheng QF, Osele L. Identifizierung des vitalen Myokards mit der 201T1-Szintigraphie: Ein Vergleich der Methoden. Nuklearmedizin 1993. [DOI: 10.1055/s-0038-1629667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
ZusammenfassungEs wurden die Ergebnisse der Standardtechnik Stress-Redistribution, (R1) mit jenen nach Reinjektion von 37 MBq sofort nach der ersten Spätaufnahme und Bilddokumentation nach 15 min (R2), mit jenen einer Spätaufnahme nach 24 h (R3) und mit jenen, die mit einer zeitlich versetzten Ruheinjektion (R4) gemacht wurden, bei 24 Patienten mit vorangegangenem Herzinfarkt verglichen. Die in drei Projektionsebenen angefertigten planaren Bilder wurden in 216 Segmente unterteilt. Die Anreicherung des 201TI wurde mittels eines subjektiven Scores bzw. semiquantitativer Analyse der Flächen, die aus dem Circumferenzprofil gewonnen wurden, bewertet. Ein Speicherungsdefekt wurde unter Belastung in 127 Segmenten bestätigt (58,7%); die visuelle Analyse konnte eine verbesserte Anreicherung in R1 (32,3%), in R2 (41,7%), in R3 (33%) und in R4 (49,6%) feststellen. Die semiquantitative Bewertung hat nur mit der R1- Methode (62% der Fälle) eine Verbesserung erbracht. Es wurde bei 6 Patienten (25% der Fälle) vitales Myokard nachgewiesen, welches nicht mit der konventionellen Analyse identifiziert werden konnte.
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