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Objective:To investigate the application of different imaging methods of 99Tc m-pyrophosphate (PYP) in the diagnosis and pathological classification of cardiac amyloidosis (CA). Methods:A total of 31 patients (22 males, 9 females, age 21-81(57.2±13.4) years) with suspected CA who underwent 99Tc m-PYP dual-phase scintigraphy (early-phase: 1 h, delay-phase: 2-3 h) and SPECT/CT (1 h) between December 2018 and December 2019 in Peking Union Medical College Hospital were retrospectively included. Taking clinical diagnosis as the standard, the results of visual score (≥2, positive) and semi-quantitative values (heart to contralateral lung (H/CL)≥1.5, positive) of 99Tc m-PYP uptake in dual-phase scintigraphy and SPECT/CT imaging were analyzed. One-way analysis of variance and Bonferroni test were used to analyze the data. Results:Among 31 patients with suspected CA, 15 were clinically diagnosed as CA (5 patients with transthyretin-related CA (ATTR-CA) and 10 patients with light chain CA (AL-CA)) and 16 were diagnosed as non-CA. All 5 patients with ATTR-CA had positive dual-phase scintigraphy and SPECT/CT imaging results. Three out of 10 patients with AL-CA had positive early-phase scintigraphy whereas negative delay-phase scintigraphy and SPECT/CT imaging results. Sixteen patients who were clinically diagnosed as non-CA had negative dual-phase scintigraphy and SPECT/CT imaging results. The sensitivity (5/5), specificity (10/10), positive predictive value (5/5), negative predictive value (10/10) and accuracy (15/15) of delay-phase scintigraphy and SPECT/CT imaging were the same. Among 31 patients, 16 patients carried transthyretin-related (TTR) gene mutation, and 4 of them who clinically diagnosed as variant ATTR (ATTRv) had positive image findings while 12 of them who not clinically diagnosed as CA had negative image findings. There were significant differences in H/CL between ATTR-CA group and AL-CA group in early-phase (2.11±0.24 vs 1.31±0.07) and delay-phase (2.02±0.19 vs 1.30±0.05; F values: 75.41 and 87.15, Bonferroni test, both P<0.01). Conclusions:99Tc m-PYP delay-phase scintigraphy and SPECT/CT have high diagnostic efficiencies in ATTR-CA, helping to determine the pathological classification of CA; while early-phase scintigraphy has false positive results. Moreover, 99Tc m-PYP imaging is helpful to detect CA in patients with TTR gene mutation.
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Objective To evaluate the therapeutic efficacy of YunKe and prednisone on moderate and severe thyroid associated ophthalmopathy(TAO).Methods 1 08 hyperthyroidism patients with moderately severe TAO were randomly divided into YunKe group,hormone group and the control group.All of the patients were given anti -thyroid medication(ATD)treatment.By thyroid hormone level upper limit every times higher than normal for a sulfhydryl imidazole 5mg/day to calculate daily dosage,based on thyroid hormone level adjusted a sulfhydryl imidazole dose every two weeks,make thyroid hormone levels in the normal range.YunKe set:intravenous push note YunKe per day A +B agent four groups (including cloud 20mg),each treatment medicine for five days in A row,interval of 25 days to the next period of treatment,medication six procedures.Hormone group:oral prednisone for 6 months,monthly dose in the order 1 mg·kg -1 ·d -1 ,0.75mg·kg -1 ·d -1 ,0.5mg·kg -1 ·d -1 ,0.25mg·kg -1 ·d -1 ,0.1 25mg·kg -1 ·d -1 , 0.062 5mg·kg -1 ·d -1 ,1 time a day,took at 8 o'clock in the morning.The control group treated ATD.Before and 6 months after treatment,all of the patients were checked the TNF -αand TRab,CT scan to measure degree of exophthalmus.Six months after treatment,respectively,on the basis of TAO classification (NOSPECS)and TNF -α, TRab level changes to determine the efficacy of treatment.Data entry Excel 2003 statistical software,used SPSS 1 9.0 statistical software to analyze data.Non parametric tests of three groups of data with Kruskal Wallis test.Not matching the two independent samples nonparametric test with the Mann -Whitney test,with P <0.05 for the difference was statistically significant.Results The markedly effective rate,effective rate and ineffective rate of YunKe group were 36.1 %,47.2% and 1 6.7% respectively,which of the hormone group were 20.0%,37.1 % and 42.9%,which of the control group were 1 3.9%,22.2% and 63.9%.The efficacy among the three groups had statistically significant differences (Kruskal -Wallis χ2 =1 0.736,P =0.005 ).The lighter exophthalmos,tge curative effect was better (Mann -Whitney Z =-4.599,P <0.001 ).The changes of TNF alpha,TRab levels among the three groups had significant differences(YunKe group,the TNF alpha,TRab levels markedly reduced 75.0% and 80.6%,respectively, which of the hormone group were 37.1 % and 34.3%,which of the control group were 1 9.4% and 27.8%,TNF χ2 =23.527,P <0.001 ;TRab χ2 =23.831 ,P <0.001 ).Conclusion The therapeutic efficacy of YunKeon TAO is better than prednisone,but the long -term effect deserves more investigation.
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FUNDAMENTO: O infarto do miocárdio perioperatório (IMPO) é uma complicação da cirurgia de revascularização miocárdica (CRM) com potencial impacto prognóstico. A cintilografia miocárdica (CM) com pirofosfato marcado com tecnécio-99m é utilizada no diagnóstico de IMPO, mas demonstra limitada sensibilidade para lesões subendocárdicas. A ressonância magnética cardiovascular (RMC), por sua vez, detém alta acurácia para a detecção de necrose miocárdica. OBJETIVO: Comparar a RMC e a CM para a detecção de IMPO após CRM. MÉTODOS: Foram estudados 24 pacientes portadores de doença arterial coronária crônica, com a técnica de realce tardio pela RMC e com a CM, antes e depois da CRM, analisando-se o surgimento de áreas de necrose miocárdica perioperatória (IMPO). Mensuraram-se também marcadores bioquímicos de lesão miocárdica (CKMB e troponina I), antes e depois da cirurgia. RESULTADOS: Dezenove pacientes completaram o estudo. Desses, 6 (32 por cento) apresentaram IMPO à RMC, e 4 (21 por cento) à CM (p = NS). Dos 323 segmentos do ventrículo esquerdo avaliados, 17 (5,3 por cento) exibiram necrose perioperatória à RMC, e 7 (2,2 por cento) à CM (p = 0,013). Observou-se moderada concordância entre os métodos (kappa = 0,46), havendo divergência, quanto ao diagnóstico de IMPO, em 4 (21 por cento) casos, a maioria com pequenas áreas de necrose perioperatória à RMC, não visualizadas à CM. Em todos os casos com IMPO à RMC, houve elevação significativa de CKMB e troponina I. CONCLUSÃO: Houve moderada concordância diagnóstica entre os métodos para a detecção de IMPO, mas a RMC permitiu a visualização de pequenas áreas de necrose miocárdica perioperatória, não identificadas pela CM e associadas à elevação de marcadores bioquímicos de lesão miocárdica.
BACKGROUND: Perioperative myocardial infarction (POMI) is a complication of coronary artery bypass grafting (CABG) with a potential prognostic impact. Technetium-99m pyrophosphate myocardial scintigraphy (MS) is used in the diagnosis of POMI; however it shows a limited sensitivity for subendocardial lesions. Cardiovascular magnetic resonance imaging (CMRI), in turn, has a high accuracy in the detection of myocardial necrosis. OBJECTIVE: To compare CMRI and MS for the detection of POMI after CABG. METHODS: A total of 24 patients with chronic coronary artery disease were studied using the delayed contrast enhanced CMRI and MS before and after CABG by analyzing the development of areas of perioperative myocardial necrosis (POMI). Biochemical markers of myocardial injury (CKMB and troponin I) were also determined before and after surgery. RESULTS: Nineteen patients completed the study. Of these, 6 (32 percent) presented POMI on CMRI and 4 (21 percent) on MS (p = NS). Of the 323 left ventricular segments assessed, 17 (5.3 percent) showed perioperative necrosis on CMRI and 7 (2.2 percent) on MS (p = 0.013). Moderate agreement was observed between the methods (kappa = 0.46). There was disagreement regarding the diagnosis of POMI in 4 (21 percent) cases, most of them with small areas of perioperative necrosis on CMRI which were not visualized on MS. In all cases with POMI on CMRI, significant CKMB and troponin I elevations were observed. CONCLUSION: Moderate diagnostic agreement was observed between the methods for the detection of POMI, but CMRI enabled visualization of small areas of perioperative myocardial necrosis which were not identified on MS and were associated with elevation of biochemical markers of myocardial injury.