Patient characteristics
Characteristics of Inner-Cath group (N=42) and Outer-Cath group (N=32) patients with de novo CRT implantation are shown in Table 1. The patients of the Inner-Cath group were significantly younger (63±12 vs. 72±11 years, P=0.015) and received a greater number of CRT defibrillators (CRTD) (95% vs. 66%, p<0.001) compared with the Outer-Cath group. Gender, comorbidities, and indicators of heart failure did not differ significantly between the two groups.