The Significance of Cardiac Sympathetic Nerve Imaging with 123I-Metaiodobenzylguanidine for Predicting the Occurrence of Ventricular Tachycardia in Patients with Idiopathic Dilated Cardiomyopathy
Korean Circulation Journal
;
: 510-516, 2007.
Artículo
en Coreano
| WPRIM
| ID: wpr-212715
ABSTRACT
BACKGROUND AND OBJECTIVE:
Ventricular arrhythmia is an important cause of death in patients suffering with idiopathic dilated cardiomyopathy (IDCM). The decreased uptake or increased "washout" of 123I-metaiodobenzylguanidine (MIBG)-derived radioactivity is associated with a worse prognosis or severe disease in patients with cardiac diseases. SUBJECTS ANDMETHODS:
Forty patients (28 men, mean age 56.5+/-13.0 years) with angiographically proven IDCM were studied and divided into 2 groups the patients with clinically documented ventricular tachycardia (VT) and IDCM (group A; 17 patients), and the patients without VT, but with IDCM (group B; 23 patients). The normal control group (7 men, mean age 62.4+/-7.9) was compared theses patients. 123I-MIBG was evaluated by the early (15 min) and delayed (3hours) uptake, the heart to mediastinum uptake (H/M) ratio and the global and regional washout ratio (WOR) that was defined as the [early H uptake-delayed H uptake]/early H uptake. The clinical variables, echocardiographic parameters and 123I-MIBG-derived parameters were compared among three groups.RESULTS:
There were no significant differences in age and the echocardiographic parameters between the groups A and B. A significant negative correlation was present between the early inferior wall H/M ratio and the LVEDD (Spearman's correlation, r=-0.412, p=0.08), and the early inferior H/M ratio and the LVESD (Spearman's correlation, r=-0.463, p=0.03). Only the delayed lateral wall uptake was significantly lower in group A than that in group B (23.3+/-5.3 versus 27.8+/-8.4, respectively p=0.042). The regional WOR was not statically different among the three groups.CONCLUSION:
Cardiac 123I-MIBG SPECT partially reflects the vulnerability for the occurrence of VT in patients suffering with IDCM. These results support the feasibility of using cardiac 123I-MIBG SPECT as a prognostic tool in IDCM patients.
Texto completo:
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Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Arritmias Cardíacas
/
Pronóstico
/
Radiactividad
/
Ecocardiografía
/
Cardiomiopatía Dilatada
/
Cintigrafía
/
Tomografía Computarizada de Emisión de Fotón Único
/
Causas de Muerte
/
Taquicardia Ventricular
/
Corazón
Tipo de estudio:
Estudio pronóstico
Límite:
Humanos
/
Masculino
Idioma:
Coreano
Revista:
Korean Circulation Journal
Año:
2007
Tipo del documento:
Artículo
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