Scientific publications

Left ventricular pacing site in cardiac resynchronization therapy: clinical follow-up and predictors of failed lateral implant

Macías A, Gavira JJ, Castaño S, Alegría E, García-Bolao I.
Department of Cardiology and Cardiovascular Surgery, University Clinic, School of Medicine, University of Navarra, Pamplona, Spain

Magazine: European Journal of Heart Failure

Date: Apr 1, 2008


The effects of the left ventricular (LV) pacing site on the clinical results of resynchronization therapy (CRT) are not well characterized. The aim of this study was to define the effect of LV lead location on clinical response and LV remodelling, and to identify predictors of failure to implant the LV lead in a lateral location. One hundred and seventy two consecutive patients were evaluated at baseline and 6 months after CRT.

In 128 patients, the LV lead was implanted in the lateral region (Group 1), while 44 received an anterior implant due to anatomical or electrical factors (Group 2). Group 1 was associated with a significantly better functional outcome assessed both by NYHA class (p<0.001) and by the six-minute-walk test (p=0.01) compared with group 2. LV ejection fraction and volumes, and inter- and intraventricular dyssynchrony only improved significantly (p<0.01) in group 1. The only independent predictor of a failed lateral implant was the presence of ischaemic cardiomyopathy (OR 3.29, 95% CI 2.2-13.7; p=0.02). In conclusion, a lateral lead location results in a better functional outcome and greater reverse LV remodelling compared with anterior locations.

The presence of ischaemic cardiomyopathy is a risk factor for a failed lateral LV implant.

CITATION Eur J Heart Fail. 2008 Apr;10(4):421-7

you maybe interested


The Clínica is the greater private hospital with technological equipment of Spain, all in a single center.

Imagen de un PET, tecnología de vanguardia en la Clínica Universidad de Navarra


The professionals of the Clínica perform continuous research and training, always to the benefit of the patient.

Imagen profesionales de la Clínica Universidad de Navarra


Learn why we are different from other healthcare centers. Quality, speed, comfort and results.

Imagen del edificio de la Clínica Universidad de Navarra