Japanese
Title99mTc-MIBI心筋シンチグラフィを用いた右室梗塞評価 - 心電図同期法併用による右室機能評価を含めて -
Subtitle短報
Authors汲田伸一郎*, 水村直*, 趙圭一*, 木島鉄仁*, 隈崎達夫*, 哲翁弥生**, 酒井俊太**, 佐野純子**, 草間芳樹**, 宗像一雄**
Authors(kana)
Organization*日本医科大学放射線科, **第一内科
Journal核医学
Volume33
Number6
Page635-639
Year/Month1996/6
Article報告
Publisher日本核医学会
Abstract「要旨」 右室梗塞は左室下壁梗塞に少なからず合併することが知られており, その核医学的診断には99mTc-ピロリン酸心筋シンチグラフィが用いられている. しかしピロリン酸の陽性描出期間は通常梗塞発症後1週間程度に限定される. 著者らは梗塞発症から3か月未満の左室下壁梗塞16例に対し99mTc-MIBIを用いた心筋シンチグラフィを施行し, 右室灌流評価を行った. シンチグラム上, 16例中4例に右室下壁の欠損を認め (RVI (+) 群), 残り12例の右室集積は保たれていた (RVI (-) 群). ここで16例中14例は心筋SPECTデータ収集時に心電図同期法を併用し, 右室機能の指標として収縮に伴う右室部count density上昇度 (RV %WT) の算出を行った. RV %WTはRVI (+) 群 (n=3), RVI (-) 群 (n=11) にてそれぞれ26.7±3.2, 49.6±14.2と前者にて有意に低値を示した (p<0.01). 99mTc-MIBI心筋イメージは心・肺コントラストが高いため明瞭に右室を描出することができ, また心電図同期法を併用することにより同時に右室機能を評価することが可能である.
Practice臨床医学：一般
Keywords99mTc-MIBI, Right ventricular infarction, ECG-gated SPECT.
English
TitleECG-Gated Myocardial SPECT with 99mTc-MIBI in Patients with Right Ventricular Infarction
Subtitle
AuthorsShin-ichiro KUMITA*, Sunao MIZUMURA*, Keiichi CHO*, Tetsuji KIJIMA*, Tatsuo KUMAZAKI*, Yayoi TETSUOU**, Shunta SAKAI**, Junko SANO**, Yoshiki KUSAMA**, Kazuo MUNAKATA**
Authors(kana)
Organization*Department of Radiology, **First Department of Internal Medicine, Nippon Medical School
JournalThe Japanese Journal of nuclear medicine
Volume33
Number6
Page635-639
Year/Month1996/6
ArticleReport
PublisherTHE JAPANESE SOCIETY OF NUCLEAR MEDICINE
AbstractAlthough 99mTc-pyrophosphate (PYP) myocardial scintigraphy has so far been widely used for the diagnosis of right ventricular infarction, PYP accumulation disappears within one week or so. To evaluate the myocardial condition of the right ventricle alternatively, myocardial SPECT with 99mTc-MIBI was performed in 16 patients with acute inferior left ventricular infarction, and ECG-gated myocardial SPECT data acquisition was accompanied in 14 of 16 patients. Right ventricular perfusion defect was observed in 4 of 16 patients (RVI (+) group), and the remains were negative (RVI (-) group). Then, right ventricular count increase rate (RV %WT) of MIBI from end-diastole to end-systole was calculated using an automated method which was developed for quantification of wall thickening in our laboratory. The RV %WT was conceived to be an objective index representing right ventricular contractility. RVI (+) group (n=3) as compared with RVI (-) group (n=11) had significant lower RV %WT (26.7+-3.2 vs. 49.6+-14.2 ; p<0.01). In conclusion, ECG-gated myocardial SPECT with MIBI was considered to be useful for assessment of myocardial perfusion and contractility of right ventricle.
PracticeClinical medicine
Keywords99mTc-MIBI, Right ventricular infarction, ECG-gated SPECT.

【全文PDF】