Document Detail

Serial cardiac 123I-metaiodobenzylguanidine scintigraphic studies are more useful for predicting cardiac death than one-time scan in patients with chronic heart failure: sub-analysis of our previous report.
MedLine Citation:
PMID:  20543756     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Many studies have shown a one-time ¹²³I-metaiodobenzylguanidine (MIBG) scan during a stable period to be useful for determining the prognosis of patients with chronic heart failure (CHF). However, we recently reported that the delta washout rate (WR) determined from serial ¹²³I-MIBG scintigraphic studies is the best prognostic value in patients with CHF.
METHODS: A total of 208 patients with CHF (left ventricular ejection fraction <45%), but no cardiac events for at least 5 months, were identified on the basis of a history of decompensated acute heart failure requiring hospitalization. The patients underwent ¹²³I-MIBG scintigraphy and echocardiography just before leaving the hospital and after 6 months of treatment. We evaluated two models for predicting cardiac death using the Cox proportional hazards regression analysis. In addition to clinical characteristics, New York Heart Association functional class and pharmacotherapy, one model included variables of baseline scintigraphic and echocardiographic parameters (model A), and the other model included those of delta (i.e. follow-up minus baseline) scintigraphic and echocardiographic parameters (model B).
RESULTS: Of the 208 patients, 56 experienced fatal cardiac events during the study. In model A, a Cox proportional hazards analysis showed baseline WR ≥50% to be the only independent predictor of cardiac death (hazard ratio=2.335, 95% confidence interval=1.142-4.774, P=0.020). In model B, delta-WR≥-5% was the only incremental predictor of cardiac death (hazard ratio=4.444, 95% confidence interval=1.511-13.069, P=0.009). The survival rates of patients with a delta-WR of less than -5% were significantly higher for those with a baseline WR of less than 50% (P=0.036). Moreover, high delta-WR was the best predictor compared with single scan, single echocardiography, and their combination evaluated by the global χ² analysis.
CONCLUSION: Baseline WR and delta-WR obtained from ¹²³I-MIBG scintigraphy can be used as independent predictors of cardiac death, and two ¹²³I-MIBG scintigraphic studies are more useful than a one-time scan in stabilized patients with CHF.
Shu Kasama; Takuji Toyama; Hiroyuki Sumino; Hisao Kumakura; Yoshiaki Takayama; Kazutomo Minami; Shuichi Ichikawa; Naoya Matsumoto; Yuichi Sato; Masahiko Kurabayashi
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Publication Detail:
Type:  Clinical Trial; Journal Article    
Journal Detail:
Title:  Nuclear medicine communications     Volume:  31     ISSN:  1473-5628     ISO Abbreviation:  Nucl Med Commun     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-10-05     Completed Date:  2011-01-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8201017     Medline TA:  Nucl Med Commun     Country:  England    
Other Details:
Languages:  eng     Pagination:  807-13     Citation Subset:  IM    
Department of Medicine and Biological Science (Cardiovascular Medicine), Gunma University Graduate School of Medicine, Maebashi, Japan.
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MeSH Terms
Follow-Up Studies
Heart / radionuclide imaging*
Heart Failure / drug therapy,  radionuclide imaging*,  ultrasonography
Multivariate Analysis
Radionuclide Imaging / methods*
Survival Analysis

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