Table 1

Demographic Data, Pre-CRT and Post-CRT Outcomes (N = 8)

Age (yrs)71 ± 7.4
Male (%)8 (100)
LVEF by 2D echocardiography Simpson’s biplane before CRT27 ± 7.4
SDI derived from echocardiography (%)19
NYHA functional class II/III, before CRT implantation2/6
Ischemic etiology8 (100)
Sinus rhythm8 (100)
QRS duration (m)140 ± 7
LBBB7 (88)
LBBB by revised Strauss criteria3 (38)
Echo responders at 6 months2 (25)
LVEF by 2D echo, Simpson’s biplane after CRT29 ± 7.9
Clinical responders at 6 months3 (38)

Values are mean ± SD or n (%).

2D = 2-dimensional; CRT = cardiac resynchronization therapy; LBBB = left bundle branch block; LVEF = left ventricular ejection fraction; NYHA = New York Heart Association.

  • Echocardiographic response using 2D transthoracic echocardiography; confirmed if ≥15% reduction in end-systolic volume (ESV) at 6 months’ follow-up compared with before implantation.

  • Clinical response to CRT using Packer’s clinical composite score (26).