Usefulness of exercise SPECT-thallium to detect asymptomatic restenosis in patients who had angina before coronary angioplasty.
The usefulness of exercise single photon emission computed tomography (SPECT)-thallium for detecting asymptomatic restenosis was assessed prospectively in 62 patients with angina before angioplasty, who underwent < or = 6-month re-angiography and exercise SPECT-thallium imaging. Among patients with restenosis, nine had recurrence of angina but eight did not. These two subgroups had equivalent percentages of restenosis (71 +/- 16% vs 64 +/- 16%, NS) and extent of reversible thallium defects (2.8 +/- 1.7 vs 4.1 +/- 2.6, NS), and both subgroups had poorer hemodynamic responses to exercise compared with patients without restenosis (maximal) rate-pressure product [X 100], 258 +/- 54 and 239 +/- 33 vs 302 +/- 61; p < 0.05 and p < 0.01, respectively). Exercise testing detected fewer patients with restenosis compared to exercise SPECT-thallium imaging, especially among asymptomatic patients (25% vs 100%, p < 0.005). Asymptomatic restenosis occurs frequently, induces an amount of stress ischemia equivalent to that of symptomatic restenosis, and is efficiently detected by exercise SPECT-thallium with rest-reinjection but not by exercise testing.
Marie
P Y
PY
Department of Nuclear Medicine, CHU-Nancy, France.
Danchin
N
N
Karcher
G
G
Grentzinger
A
A
Juillière
Y
Y
Olivier
P
P
Buffet
P
P
Anconina
J
J
Beurrier
D
D
Cherrier
F
F
D000368:Aged; D000787:Angina Pectoris / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000628:therapy; D015906:Angioplasty, Balloon, Coronary / Q000706:statistics & numerical data; D017023:Coronary Angiography; D003327:Coronary Disease / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000628:therapy; D005080:Exercise Test / Q000379:methods / Q000706:statistics & numerical data; D005260:Female; D005602:France / Q000453:epidemiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012008:Recurrence; D013794:Thallium Radioisotopes; D015899:Tomography, Emission-Computed, Single-Photon / Q000295:instrumentation / Q000379:methods / Q000706:statistics & numerical data
D013794:Thallium Radioisotopes