Document Detail


Left ventricular function and visual phase analysis with equilibrium radionuclide angiography in patients with biventricular device.
MedLine Citation:
PMID:  18228016     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: Cardiac resynchronisation therapy (CRT) is a technique indicated in patients with moderate to severe heart failure and ventricular dyssynchrony. To evaluate left ventricular ejection fraction (LVEF) and synchronisation changes after CRT with a biventricular pacing implant, we used an equilibrium radionuclide angiography (ERNA). METHODS: Fifty patients were studied. An ERNA was made 72 h and 6 months after the implant. Two acquisitions were performed: with the CRT device connected and after disconnecting it. In the follow-up, responders were defined as those who had improved in accordance with various clinical variables. Quantitative changes in LVEF and visual changes in synchronisation (phase analysis) were studied comparing the two studies and also comparing the connected and disconnected modes. RESULTS: At 6 months, 30 patients were defined as responders. LVEF increased significantly at 6 months compared with the 72-h study only in responders. At 72 h, the number of patients showing a decrease in LVEF (p < 0.05) or a synchronisation worsening after disconnecting the device was higher in responders than in nonresponders. At 6 months, 57% of responders had no synchronisation changes between the connected and disconnected modes, suggesting a resynchronisation process. CONCLUSIONS: ERNA permits the study of resynchronisation patients, showing a statistical LVEF improvement at 6 months. Moreover, visual phase analysis permits the study of the mechanism involved in the response, with an important number of responders with no changes between the two modes at 6 months. In the 72-h study, after disconnection of the device, LVEF and resynchronisation worsening can predict patient improvement at 6 months.
Authors:
Africa Muxí; Pilar Paredes; Lluis Mont; Francisco J Setoain; Joan Duch; Silvia Fuertes; Jaime Ortín; Ernesto Diaz-Infante; Francisca Pons
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Publication Detail:
Type:  Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-01-29
Journal Detail:
Title:  European journal of nuclear medicine and molecular imaging     Volume:  35     ISSN:  1619-7070     ISO Abbreviation:  Eur. J. Nucl. Med. Mol. Imaging     Publication Date:  2008 May 
Date Detail:
Created Date:  2008-04-14     Completed Date:  2008-08-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101140988     Medline TA:  Eur J Nucl Med Mol Imaging     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  912-21     Citation Subset:  IM    
Affiliation:
Nuclear Medicine Department (Centre de Diagnóstic per la Imatge, CDI), Hospital Clínic, Universitat de Barcelona, Villarroel 170, 08036 Barcelona, Spain. amuxi@clinic.ub.es
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Aged, 80 and over
Computer Graphics*
Female
Gated Blood-Pool Imaging / methods*
Humans
Image Interpretation, Computer-Assisted / methods*
Male
Middle Aged
Pacemaker, Artificial*
Reproducibility of Results
Sensitivity and Specificity
Ventricular Dysfunction, Left / prevention & control*,  radionuclide imaging*

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