Valor prognóstico da tomografia miocárdia de perfusäo com raiofármacos ligados ao tecnécio-99m no acompanhamento de pacientes submetidos à primeira cirurgia de revascularizaçäo miocárdia / Prognostic value of technetium-99m-labeled single-photon emission computerized tomography in the follow-up of patients after their first myocardial revascularization surgery
Arq. bras. cardiol
;
80(1): 19-30, jan. 2003. tab, graf
Article
in Portuguese, English
| LILACS
| ID: lil-329078
RESUMO
OBJECTIVE: To assess the prognostic value of Technetium-99m-labeled single-photon emission computerized tomography (SPECT) in the follow-up of patients who had undergone their first myocardial revascularization. METHODS: We carried out a retrospective study of 280 revascularized patients undergoing myocardial scintigraphy under stress (exercise or pharmacological stress with dipyridamole) and at rest according to a 2-day protocol. A set of clinical, stress electrocardiographic and scintigraphic variables was assessed. Cardiac events were classified as "major" (death, infarction, unstable angina) and "any" (major event or coronary angioplasty or new myocardial revascularization surgery). RESULTS: Thirty-six major events occurred as follows: 3 deaths, 11 infarctions, and 22 unstable anginas. In regard to any event, 22 angioplasties and 7 new surgeries occurred in addition to major events, resulting a total of 65 events. The sensitivity of scintigraphy in prognosticating a major event or any event was, respectively, 55 percent and 58 percent, showing a negative predictive value of 90 percent and 83 percent, respectively. Diabetes mellitus, inconclusive stress electrocardiography, and a scintigraphic visualization of left ventricular enlargement were significant variables for the occurrence of a major event. On multivariate analysis, abnormal myocardial scintigraphy was a predictor of any event. CONCLUSION: Myocardial perfusion tomography with Technetium-99m may be used to identify high-risk patients after their first myocardial revascularization surgery
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Tomography, Emission-Computed, Single-Photon
/
Technetium Tc 99m Sestamibi
/
Radiopharmaceuticals
/
Coronary Disease
/
Myocardial Infarction
/
Myocardial Revascularization
Type of study:
Diagnostic study
/
Practice guideline
/
Observational study
/
Prognostic study
/
Risk factors
Limits:
Adult
/
Aged80
/
Female
/
Humans
/
Male
Language:
English
/
Portuguese
Journal:
Arq. bras. cardiol
Journal subject:
Cardiology
Year:
2003
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade Federal do Rio de Janeiro/BR
Similar
MEDLINE
...
LILACS
LIS