Ventricular Arrhythmia Risk Stratification Among Patients With Cardiac Resynchronization Therapy Devices

Figures

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  Central Figure.. Ventricular arrhythmia risk score among patients with cardiac resynchronization therapy and implantable cardioverter defibrillator devices. Left: The ventricular arrhythmia (VA) risk score stratified the risk of VA, and patients with a VA risk score ≥4 (red line) had a significantly higher risk of VA than those with VA <4 (green line) among cardiac resynchronization therapy (CRT) patients. Right: Among implantable cardioverter defibrillator (ICD) patients, there was no increased risk of VA according to the VA risk score, and no significant difference between patients with a VA risk score ≥4 (red line) and patients with a VA risk score <4 (green line).

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  Figure 1.. Study flow chart. CRT, cardiac resynchronization therapy; ICD, implantable cardioverter defibrillator; VA, ventricular arrhythmia.

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  Figure 2.. Distribution of ventricular arrhythmia event. The prevalence of ventricular arrhythmia (VA) events according to VA risk score among cardiac resynchronization therapy (CRT) and implantable cardioverter defibrillator (ICD) patients. VA events increased with an increasing VA risk score among CRT patients; however, there was no such association for ICD patients.

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  Figure 3.. Kaplan-Meier analysis. A Kaplan-Meier survival curve evaluating the effect of ventricular arrhythmia (VA) risk score (VA risk ≥4 or VA risk <4) among (A) cardiac resynchronization therapy, and (B) implantable cardioverter defibrillator patients. (A) Kaplan-Meier analysis revealed that patients with a VA risk score ≥4 (red line) had a higher risk of VA than patients with a VA risk score <4 (blue line). (B) There was no significant difference between patients with a VA risk score ≥4 (red line) and patients with a VA risk <4 (blue line).

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  Figure 4.. Kaplan-Meier analysis. A Kaplan-Meier survival curve evaluating (A) the difference of device type, and (B) the effect of ventricular arrhythmia (VA) risk score (VA risk ≥4 or VA risk <4) among (CRT) and implantable cardioverter defibrillator (ICD) patients. (A) There was no significant difference between patients with CRT (blue) and patients with ICD (green line). (B) Kaplan-Meier analysis revealed that CRT patients with a VA risk score ≥4 (red line) had a higher risk of VA than ICD patients (green line) and CRT patients with a VA risk score <4 (blue line).

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  Figure 5.. Distribution of cardiac resynchronization therapy (CRT) non-responders. The prevalence of CRT non-responders according to ventricular arrhythmia (VA) risk score among CRT patients. Prevalence of CRT non-responders increases with increasing VA risk score among CRT patients.