| Evaluation of post-stress left ventricular dysfunction and its relationship with perfusion abnormalities using gated SPECT in patients with cardiac syndrome X. | |
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MedLine Citation:
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PMID: 18349790 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: Cardiac syndrome X defines patients with typical angina, a positive exercise ECG stress test and angiographically documented normal coronary arteries. In previous studies, post-stress prolonged left ventricular dysfunction (PLVD) using gated SPECT (G-SPECT) had been well correlated with myocardial perfusion abnormalities and degree of stenotic vessels in CAG in patients with coronary artery disease. However, evaluation of left ventricular myocardial perfusion, wall motion and left ventricular ejection fraction (LVEF) in patients with cardiac syndrome X, using G-SPECT had not been studied yet. Thus, the aim of this study was to analyse PLVD using (99m)Tc-MIBI GSPECT in patients with cardiac syndrome X. METHODS: Of the patients in whom G-SPECT was performed in our institution between 2004 and 2006, 17 patients with anginal chest pain, positive exercise ECG stress test and normal coronary angiograms were retrospectively included to the study (group I). Fifteen patients with normal myocardial perfusion and another 15 patients with ischaemia on G-SPECT were selected as control groups (groups II and III). (99m)Tc-MIBI G-SPECT was performed for all patients according to 2 day (stress-rest) protocol. Stress and rest LVEF were derived automatically (SLVEF and RLVEF). Difference LVEF (DLVEF) (stress-rest) was calculated. Semiquantitative analyses were made both for myocardial perfusion and wall motion (WM), using a 20-segment model and a 5-point scoring system. DLVEF, perfusion and WM scores of all groups were compared among three groups and relationship between DLVEF, perfusion and WM scores were evaluated. RESULTS: Abnormal perfusion were detected in eight (47.1%) of patients, while the remaining nine (52.9%) had normal myocardial perfusion, in group I. Six of 17 (35.3%) patients in group I had post-stress WM abnormalities. Mean of DLVEF values were -3.1+/-3.0%, 4.4+/-2.0% and -6.0+/-5.1% in groups I, II and III, respectively (P<0.05 for group II vs. group I and group III; P>0.05 for group I vs. group III). LVEF response impairment (< or =5% increase from rest to post-stress images) was found in 17 (100%), seven (46.6%), 14 (93.3%) of patients in groups I, II and III, respectively. CONCLUSION: Abnormal myocardial perfusion, concordant transient segmental WM abnormalities and LVEF response impairment are not uncommon in patients with cardiac syndrome X of this cohort of the study population. Therefore, post-stress prolonged stunning may be attributed to these findings in some of cardiac syndrome X patients as in true ischaemic patients. However, further studies with larger number of subjects and long-term follow-up are necessary to support these findings. |
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Authors:
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Hakan Demir; Goksel Kahraman; Serkan Isgoren; Yusuf Ziya Tan; Teoman Kilic; Fatma Berk |
Publication Detail:
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Type: Evaluation Studies; Journal Article |
Journal Detail:
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Title: Nuclear medicine communications Volume: 29 ISSN: 0143-3636 ISO Abbreviation: Nucl Med Commun Publication Date: 2008 Mar |
Date Detail:
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Created Date: 2008-03-19 Completed Date: 2008-04-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8201017 Medline TA: Nucl Med Commun Country: England |
Other Details:
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Languages: eng Pagination: 208-14 Citation Subset: IM |
Affiliation:
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Department of Nuclear Medicine, Kocaeli University School of Medicine, Umuttepe Yerleskesi, Kocaeli, Turkey. hakandemir99@yahoo.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Coronary Artery Disease
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radionuclide imaging* Exercise Test Female Gated Blood-Pool Imaging / methods* Humans Male Microvascular Angina / radionuclide imaging* Middle Aged Radiopharmaceuticals / diagnostic use Reproducibility of Results Sensitivity and Specificity Technetium Tc 99m Sestamibi / diagnostic use* Tomography, Emission-Computed, Single-Photon / methods* Ventricular Dysfunction, Left / radionuclide imaging* |
| Chemical | |
Reg. No./Substance:
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0/Radiopharmaceuticals; 109581-73-9/Technetium Tc 99m Sestamibi |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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