Gated 99mTc-MIBI myocardial perfusion SPECT in patients with right bundle branch block but without evidence of coronary artery disease
- سال انتشار: 1392
- محل انتشار: مجله پزشکی هسته ای ایران، دوره: 21، شماره: 2
- کد COI اختصاصی: JR_IRJNM-21-2_004
- زبان مقاله: انگلیسی
- تعداد مشاهده: 538
نویسندگان
Nuclear Medicine Research Center, Ghaem Hospital, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
Nuclear Medicine Research Center, Ghaem Hospital, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
Nuclear Medicine Research Center, Ghaem Hospital, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
Department of Cardiovascular, Imam Reza Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
چکیده
Introduction: We aimed to investigate the effect of right bundle branch block (RBBB) on perfusion and functional parameters in dipyridamole stress/rest Tc99m-MIBI gated myocardial perfusion SPECT (GSPECT) which may be helpful in interpretation of myocardial perfusion imaging. Methods: We studied 73 patients with low pre-test likelihood of coronary artery disease in two groups: 38 patients with RBBB and 35 subjects with normal ECG. Both groups underwent two-day dipyridamole stress–rest Tc99m-MIBI GSPECT. Two groups were matched. There was no significant difference in sex and age variable between two groups. Results: Visual calculated SSS and SRS in all patients were between 0 and 3. Regarding the prone images, diaphragmatic attenuation and breast attenuation, all patients GSPECT findings were within normal limits. There was no significant difference in TID ratio between two groups: RBBB group: TID ratio= 1.02±0.16 and control group: TID ratio= 0.96±0.14 (P=0.09). There was no significant difference in left ventricular end-systolic volume, end-diastolic volume, ejection fraction, summed stress and rest motion & thickening scores between RBB patients group and control group. No regional LV wall motion abnormality was noticed in any patient in either group. Conclusion: High normality rate of the LV myocardial perfusion and functional indices in the presence of RBBB was noticed in gated Dipyridamole stress/rest Tc-99m sestamibi myocardial perfusion SPECT. No remarkable false positive perfusion findings or abnormal LV functional indices acquired by GSPECT in this group of patients.کلیدواژه ها
RBBB, Myocardial perfusion, Gated SPECT, coronary artery diseaseاطلاعات بیشتر در مورد COI
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