ADENOSINE TECHNETIUM-99M-METHOXY ISOBUTYL ISONITRILE MYOCARDIAL TOMOGRAPHY IN PATIENTS WITH CORONARY-ARTERY DISEASE - COMPARISON WITH EXERCISE(194 views visite) Cuocolo A, Soricelli A, Pace L, Nicolai E, Castelli L, Nappi A, Imbriaco M, Morisco C, Ell PJ, Salvatore M
Affiliations Affiliazioni: Via Posillipo 66, 80123 Napoli, Italy
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ADENOSINE TECHNETIUM-99M-METHOXY ISOBUTYL ISONITRILE MYOCARDIAL TOMOGRAPHY IN PATIENTS WITH CORONARY-ARTERY DISEASE - COMPARISON WITH EXERCISE
We compared the results of adenosine and bicycle exercise Tc-99m-methoxy isobutyl isonitrile (MIBI) myocardial SPECT in 22 patients (18 males and 4 females, mean age 51 +/- 11 yr) with angiographically documented coronary artery disease (CAD). Methods: All patients were submitted on separate days to three intravenous injections of Tc-99m-MIBI (20 mCi); one at rest, one during exercise and one during adenosine (140 mu g/kg per min for 6 min with injection of Tc-99m-MIBI at 4 min). A total of 484 myocardial segments were quantitatively analyzed. Results: Adenosine induced a significant increase of heart rate (94 +/- 16 bpm at peak versus 70 +/- 13 bpm at rest, p < 0.01). Systolic and diastolic blood pressure were not significantly different after adenosine infusion compared to rest. In all segments, a significant relationship between exercise and adenosine Tc-99m-MIBI uptake was observed (r = 0.90, p < 0.0001). Concordance between the two studies for identification of perfusion status was observed in 438 (90%) of the 484 segments (kappa value of 0.81). Agreement on localization of the perfusion defect to a specific vascular territory was 92%. Conclusion: Despite different hemodynamic effects, adenosine and exercise Tc-99m-MIBI SPECT imaging provide similar information in the diagnosis and localization of CAD.
ADENOSINE TECHNETIUM-99M-METHOXY ISOBUTYL ISONITRILE MYOCARDIAL TOMOGRAPHY IN PATIENTS WITH CORONARY-ARTERY DISEASE - COMPARISON WITH EXERCISE
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