Alternative TitleImpairment of iodine-123-metaiodobenzylguanidine (123I-MIBG) uptake in patients with pulmonary artery hypertension
Periodical titleInternational Heart Journal
Degree Type博士(医学)
Doctor of Philosophy in Medical Science
Note (General)博士論文全文, 最終試験結果の要旨, 論文審査の要旨, 博士論文要旨
According to recent studies, lung uptake of iodine-123-metaiodobenzylguanidine (123I-MIBG) is impaired in many lung diseases and low lung uptake of 123I-MIBG suggests endothelial dysfunction of the pulmonary artery.123I-MIBG scintigraphy in patients with pulmonary hypertension (PH) has not yet been clinically evaluated. We hypothesized that the lung uptake of 123I-MIBG is reduced in patients with PH and differs among PH subtypes. The purpose of the present study was to analyze the lung uptake of 123I-MIBG in patients with PH and compare it with the data obtained by echocardiography or right heart catheterization. 123I-MIBG scintigraphy was performed in 286 consecutive patients from 2003 to 2014. We enrolled 21 patients with PH and 8 control patients.The 21 patients with PH were categorized into those with pulmonary artery hypertension(PAH, n=12) and those with chronic thromboembolic pulmonary hypertension (CTEPH, n=9). The mean pulmonary artery pressure was not significantly different between patients with CTEPH and PAH (37.7 ± 6.8 versus 32.3 ± 5.3 mmHg respectively; P=0.054). There were no significant differences in any other hemodynamic parameters between the two groups.The lung uptake of 123I-MIBG in PAH patients (early image: 1.54 ± 0.18, delayed image: 1.41 ± 0.16) was significantly lower than that of CTEPH patients (early image: 2.17 ± 0.25,P<0.0001; delayed image: 1.99 ± 0.20, P=0.0001, adjusted for ageand World Health Organization classification) and controls(early image: 2.32 ± 0.27, P=0.0007; delayed image: 1.92 ± 0.19,P=0.0007). In conclusion, we found for the first time that the lung uptake of 123I-MIBG in patients with PAH is lower than that in patients with CTEPH and controls.
Collection (particular)国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文
Date Accepted (W3CDTF)2018-09-03T21:27:21+09:00
Data Provider (Database)国立国会図書館 : 国立国会図書館デジタルコレクション