Diagnostic accuracy of dipyridamole technetium 99m-labeled sestamibi myocardial tomography for detection of coronary artery disease.
BACKGROUND
The diagnostic accuracy of exercise 99mTc-labeled sestamibi and intravenous dipyridamole 201Tl-labeled myocardial tomography is established. The accuracy of dipyridamole stress 99mTc-labeled sestamibi myocardial tomography for the detection of coronary artery disease has not been reported.


RESULTS
Our purpose was to determine the diagnostic accuracy of same-day, rest-dipyridamole stress 99mTc-labeled sestamibi myocardial single-photon emission computed tomography (SPECT) compared with coronary angiography. Two hundred forty-four patients who were unable to exercise adequately underwent both dipyridamole 99mTc-labeled sestamibi SPECT and coronary angiography within 6 months. Dipyridamole was administered intravenously in a standard dose of 0.56 mg/kg for 4 minutes. Cardiac and noncardiac side effects were recorded. The presence of coronary stenoses of 50% or greater diameter reduction in each of the major coronary arteries was compared with imaging data in corresponding myocardial perfusion beds. The patient population was predominately (98.8%) male with a mean age of 63 +/- 9 years (range 33 to 83 years). The majority of patients had stable angina (88%). Eighty-four patients (35%) gave a prior history of myocardial infarction; 44 patients (18%) had a history of congestire heart failure. The principal limitation to exercise stress was peripheral vascular disease in 62 patients (26%). No serious side effects occurred during dipyridamole stress; 14% of patients had chest pain and 8% of patients had 1 mm or greater ST segment depression. Of the 204 patients with documented coronary stenoses, 43 (21%) had single-vessel disease and 161 (79%) had multivessel disease. The sensitivity was 93% (40/43 in patients with single-vessel disease) and 91% (146/161 in patients with multivessel disease). Overall sensitivity was 91%. The specificity was 28% (11/40) in this population with a high prestest probability of coronary artery disease and posttest referral for cardiac catheterization.


CONCLUSIONS
99mTc-labeled sestamibi myocardial tomography in conjunction with intravenous dipyridamole stress is a safe and sensitive method for the detection of coronary artery disease. The diagnostic accuracy of dipyridamole stress 99mTc-labeled sestamibi SPECT for the detection of coronary artery disease is similar to that reported for exercise stress 99mTc-labeled sestamibi tomography, making this a suitable alternative for the evaluation of patients who are unable to exercise adequately.
Miller
D D
DD
Department of Internal Medicine, St. Louis University School of Medicine, MO 63104, USA.
Younis
L T
LT
Chaitman
B R
BR
Stratmann
H
H
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000787:Angina Pectoris / Q000000981:diagnostic imaging; D017023:Coronary Angiography; D003326:Coronary Circulation; D003327:Coronary Disease / Q000145:classification / Q000000981:diagnostic imaging*; D003331:Coronary Vessels / Q000000981:diagnostic imaging; D004176:Dipyridamole / Q000008:administration & dosage / Q000009:adverse effects; D004562:Electrocardiography / Q000187:drug effects; D005080:Exercise Test; D005260:Female; D006333:Heart Failure / Q000000981:diagnostic imaging; D006801:Humans; D007275:Injections, Intravenous; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000000981:diagnostic imaging; D016491:Peripheral Vascular Diseases / Q000150:complications; D011336:Probability; D019275:Radiopharmaceuticals; D012680:Sensitivity and Specificity; D017256:Technetium Tc 99m Sestamibi; D013794:Thallium Radioisotopes; D015899:Tomography, Emission-Computed, Single-Photon; D014665:Vasodilator Agents / Q000008:administration & dosage / Q000009:adverse effects
D019275:Radiopharmaceuticals; D013794:Thallium Radioisotopes; D014665:Vasodilator Agents; D004176:Dipyridamole; D017256:Technetium Tc 99m Sestamibi