Your browser doesn't support javascript.
loading
Paced QRS axis as a predictor of pacing-induced left ventricular dysfunction.
Kim, Sung-Hwan; Oh, Yong-Seog; Nam, Gi-Byoung; Choi, Kee-Joon; Park, Jae Seok; Park, Sang Weon; Park, Seung-Jung; On, Young Keun; Kim, June Soo; Shin, Woo-Seung; Kim, Ji-Hoon; Jang, Sung-Won; Lee, Man Young; Kim, You-Ho; Rho, Tai-Ho.
Afiliación
  • Kim SH; Division of Cardiology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul St. Mary's Hospital, 222 Banpo-daero, Seocho-gu, Seoul, 137-701, South Korea.
J Interv Card Electrophysiol ; 41(3): 223-9, 2014 Dec.
Article en En | MEDLINE | ID: mdl-25380704
PURPOSE: The selection of the optimal right ventricular (RV) pacing site remains unclear. We hypothesized that a normal paced QRS axis would provide a physiological ventricular activation and lead to a better long-term outcome. METHODS: We evaluated 187 patients who underwent a permanent pacemaker implantation and were dependent on RV pacing. The pacing sites were classified as the apex and non-apex according to the chest radiography. A paced QRS axis was defined as that between -30° and 90°. Preservation of the left ventricular (LV) systolic function was defined as that with a <10 % decrease in the ejection fraction after the pacemaker implantation. RESULTS: The median follow-up period was 5.8 years (interquartile 3.9-9.0). Radiographically, the RV leads were located in the apex (n = 148, 79 %) or non-apex (n = 39, 21 %). In the electrocardiogram, normal paced and abnormal paced QRS axes were observed in 28 patients (15 %) and 159 patients (85 %), respectively. The LV ejection fraction was decreased in the patients with an abnormal paced QRS axis (-10 ± 10 %, P < 0.001), but not in those with a normal axis (0 ± 6 %, P = 0.80). The electrocardiographic determinant differentiated a preserved LV function (95 % vs. 35 %, log-rank P = 0.04). Among the patients with radiographically non-apical pacing, a normal paced QRS axis was an additional meaningful predictor of a preserved LV function after the pacemaker implantation (95 % vs. 24 %, log-rank P = 0.002). CONCLUSION: Compared with the radiographic method, a normal paced QRS axis was associated with a preserved LV function.
Asunto(s)
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estimulación Cardíaca Artificial / Disfunción Ventricular Izquierda / Técnicas Electrofisiológicas Cardíacas / Electrocardiografía Tipo de estudio: Diagnostic_studies / Observational_studies / Prognostic_studies / Risk_factors_studies Límite: Aged / Female / Humans / Male Idioma: En Revista: J Interv Card Electrophysiol Asunto de la revista: CARDIOLOGIA Año: 2014 Tipo del documento: Article País de afiliación: Corea del Sur Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estimulación Cardíaca Artificial / Disfunción Ventricular Izquierda / Técnicas Electrofisiológicas Cardíacas / Electrocardiografía Tipo de estudio: Diagnostic_studies / Observational_studies / Prognostic_studies / Risk_factors_studies Límite: Aged / Female / Humans / Male Idioma: En Revista: J Interv Card Electrophysiol Asunto de la revista: CARDIOLOGIA Año: 2014 Tipo del documento: Article País de afiliación: Corea del Sur Pais de publicación: Países Bajos