[Adenosine triphosphate loading thallium-201 myocardial scintigraphy: optimal dose and diagnostic accuracy].
Adenosine triphosphate (ATP) is an alternative to dipyridamole or adenosine in thallium-201 myocardial scintigraphy. However, the optimal dose of ATP has not been determined. A Doppler guide wire study showed the coronary flow velocity at a dose of 0.15 mg/kg of ATP was equal or higher than that at 0.14 mg/kg of adenosine or 0.56 mg/kg of dipyridamole. ATP was given intravenously to 67 patients with coronary artery disease at 0.15 mg/kg/min for 6 min. Thallium-201 was injected at 3 min, followed by immediate and delayed (3 hrs) tomographic imaging. There was no serious side effect during examination, although chest pain (26%), dyspnea (17%), and flushing (33%) were common. The sensitivity and specificity to detect coronary artery disease were 98 and 100%, respectively. The sensitivity to detect left anterior descending artery, left circumflex artery, and right coronary artery lesions was 94, 59 and 77%, respectively. ATP loading thallium-201 scintigraphy provides an accurate diagnosis of coronary artery disease. The optimal dose of ATP is 0.15 mg/kg/min for 6 min.
Yonezawa
Y
Y
Department of Cardiology, Kobe General Hospital.
Yoshikawa
J
J
Shakudo
M
M
Okumachi
F
F
Shiratori
K
K
Koizumi
K
K
Akasaka
T
T
Yoshida
K
K
Ikekubo
K
K
D000255:Adenosine Triphosphate / Q000008:administration & dosage; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003327:Coronary Disease / Q000000981:diagnostic imaging* / Q000503:physiopathology; D005080:Exercise Test; D006321:Heart / Q000000981:diagnostic imaging*; D006439:Hemodynamics / Q000187:drug effects; D006801:Humans; D008875:Middle Aged; D011237:Predictive Value of Tests; D011877:Radionuclide Imaging; D012680:Sensitivity and Specificity; D013794:Thallium Radioisotopes
D013794:Thallium Radioisotopes; D000255:Adenosine Triphosphate