Table 1

Treatment options with ICD or CRT for people with heart failure who have left ventricular dysfunction with an LVEF of 35% or less (according to NYHA Class, QRS duration and the presence of LBBB)

NYHA Class
<120 msICD if there is a high risk of sudden cardiac deathICD and CRT not clinically indicated
120–149 ms without LBBBICDICDICDCRT-P
120–149 ms with LBBBICDCRT-DCRT-P or CRT-DCRT-P
≥150 ms with or without LBBBCRT-DCRT-DCRT-P or CRT-DCRT-P
  • Adapted from TA314. CRT, cardiac resynchronisation technology; LBBB, left bundle branch block; LVEF, left ventricular ejection fraction; NYHA, New York Heart Association.