Figure 4.

Incidence rate difference of appropriate implantable cardioverter defibrillator therapy in patients with post-cardiac resynchronization therapy left ventricular ejection fraction recovery to ≥45%. Incidence rate difference of patients with appropriate implantable cardioverter defibrillator therapy and post-cardiac resynchronization therapy left ventricular ejection fraction ≥45% compared with patients with post-cardiac resynchronization therapy left ventricular ejection fraction <45% for all studies (A) and for studies which blanked implantable cardioverter defibrillator therapies occurring between cardiac resynchronization therapy implant and follow-up left ventricular ejection fraction assessment (B). Shown are pooled incidence rate differences. CI, confidence interval; IRD, incidence rate difference.