Document Detail


Relationship between cardiac adrenergic image and exercise testing in heart failure.
MedLine Citation:
PMID:  21503390     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: The exercise treadmill test can be used in ventricular dysfunction patients for functional capacity or predicting prognosis. The cardiac image with 123I MIBG shows cardiac sympathetic activation. OBJECTIVE: To evaluate the relationship between exercise treadmill test variables and cardiac image changes in 123I MIBG. METHODS: 23 patients with LVEF < 45% performed scintigraphy cardiac with 123I MIBG and divided into two groups. G1: Washout rate < 27%; G2: > 27%. Systolic blood pressure (SBP), heart rate (HR) and functional capacity were evaluated. It was performed Student t test or Mann-Whitney U test, Spearman coefficient and linear regression. RESULTS: SBP at exercise peak (G1: 181.00 ± 28.01; G2: 153.27 ± 27.71 mmHg, p = 0.027), SBP variation [G1: 64(47.5-80.5); G2: 36(25-47) mmHg, p = 0.015], the HR at exercise peak (G1: 136.91 ± 19.66; G2: 118.45 ± 13.98 bpm, p = 0.018) and chronotropic response (G1: 70.42 ± 17.94; G2: 49.47 ± 14.89%, p = 0.006), and functional capacity [G1: 8.37(6.47-10.27); G2: 4.42(2.46-6.38) METs, p = 0.003] were smaller in G2 group. There was negative correlation between Washout rate and SBP at exercise peak (r = -0.505, p = 0.014), variation in SBP (r = -0.493, p = 0.017) and functional capacity (r = -0.646, p = 0.001). Nevertheless, SBP at exercise peak (r = -0.422, p = 0.016) and functional capacity (r = -0.804, p = 0.004) were the only variables associated with Washout rate, after linear regression. CONCLUSION: In heart failure patients, the SBP at exercise peak and functional capacity were the variables associated with Washout rate.
Authors:
Leandro Rocha Messias; Maria Ângela M de Queiroz Carreira; Sandra Marina Ribeiro de Miranda; Jader Cunha de Azevedo; Isabela Ambrósio Gava; Ronaldo Campos Rodrigues; Elizabeth Maróstica; Antônio Claudio Lucas da Nóbrega; Claudio Tinoco Mesquita
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-4-15
Journal Detail:
Title:  Arquivos brasileiros de cardiologia     Volume:  -     ISSN:  1678-4170     ISO Abbreviation:  -     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-4-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0421031     Medline TA:  Arq Bras Cardiol     Country:  -    
Other Details:
Languages:  ENG; POR     Pagination:  -     Citation Subset:  -    
Affiliation:
Universidade Federal Fluminense, Niterói, RJ.
Vernacular Title:
Relação entre imagem adrenérgica cardíaca e teste ergométrico na insuficiência cardíaca.
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