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Updates of CRT guidelines-How do We Screen CRT
Candidates?林亮宇台大醫院心血管中心
Hawkins NH, JACC 2009
CRT in Narrow QRS but with Dyssynchrony
2012 ACCF/AHA/HRS Focused Update Incorporated Into the 2008 Guidelines for Device-Based Therapy of Cardiac Rhythm Abnormalities
Developed in Collaboration With the American Association for Thoracic Surgery, Heart Failure Society of America, and
Society of Thoracic Surgeons
Cardiac Resynchronization Therapy in Patients With Systolic Heart Failure
CRT is indicated for patients who have left ventricular ejection fraction (LVEF) less than or equal to 35%, sinus rhythm, LBBB with a QRS duration greater than or equal to 150 ms, and NYHA class II, III, or ambulatory IV symptoms on GDMT. (Level of Evidence: A for NYHA class III/IV; Level of Evidence: B for NYHA class II).1
CRT can be useful for patients who have LVEF less than or equal to 35%, sinus rhythm, LBBB with a QRS duration 120 to 149 ms, and NYHA class II, III, or ambulatory IV symptoms on GDMT.2
CRT can be useful for patients who have LVEF less than or equal to 35%, sinus rhythm, a non-LBBB pattern with a QRS duration greater than or equal to 150 ms, and NYHA class III/ambulatory class IV symptoms on GDMT.2
I IIa IIb III
III IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIIaIIaIIa IIbIIbIIb IIIIIIIII
III IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIIaIIaIIa IIbIIbIIb IIIIIIIII
III IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIIaIIaIIa IIbIIbIIb IIIIIIIII
Recs Modified
2012
1. Modified recommendation (specifying CRT in patients with LBBB of 150 ms; expanded to include those with NYHA class II symptoms).2. New Recommendation
Cardiac Resynchronization Therapy in Patients With Systolic Heart Failure
CRT can be useful in patients with atrial fibrillation and LVEF less than or equal to 35% on GDMT if a) the patient requires ventricular pacing or otherwise meets CRT criteria and b) AV nodal ablation or pharmacologic rate control will allow near 100% ventricular pacing with CRT.1
CRT can be useful for patients on GDMT who have LVEF less than or equal to 35% and are undergoing new or replacement device placement with anticipated requirement for significant (>40%) ventricular pacing.2
CRT may be considered for patients who have LVEF less than or equal to 30%, ischemic etiology of heart failure, sinus rhythm, LBBB with a QRS duration of greater than or equal to 150 ms, and NYHA class I symptoms on GDMT.3
I IIaIIb III
III IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIIaIIaIIa IIbIIbIIb IIIIIIIII
III IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIIaIIaIIa IIbIIbIIb IIIIIIIII
Recs Modified
2012
1. Modified recommendation (wording changed to indicate benefit based on ejection fraction rather than NYHA class; level of evidence changed from C to B).
2. Modified recommendation (wording changed to indicate benefit based on ejection fraction and need for pacing rather than NYHA class; class changed from IIb to IIa).
3. New Recommendation
Cardiac Resynchronization Therapy in Patients With Systolic Heart Failure
CRT may be considered for patients who have LVEF less than or equal to 35%, sinus rhythm, a non-LBBB pattern with QRS duration 120 to 149 ms, and NYHA class III/ambulatory class IV on GDMT.1
CRT may be considered for patients who have LVEF less than or equal to 35%, sinus rhythm, a non-LBBB pattern with a QRS duration greater than or equal to 150 ms, and NYHA class II symptoms on GDMT.1
CRT is not recommended for patients with NYHA class I or II symptoms and non-LBBB pattern with QRS duration less than 150 ms.1
CRT is not indicated for patients whose comorbidities and/or frailty limit survival with good functional capacity to less than 1 year.2
III IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIIaIIaIIa IIbIIbIIb IIIIIIIII
III IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIIaIIaIIa IIbIIbIIb IIIIIIIII
III IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIIaIIaIIa IIbIIbIIb IIIIIIIII
Recs Modified
2012
No Benefit
No Benefit
III IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIII IIaIIaIIa IIbIIbIIb IIIIIIIIIIIaIIaIIa IIbIIbIIb IIIIIIIII
1. New Recommendation2. Modified recommendation (wording changed to include cardiac as well as noncardiac comorbidities).
Summary of ACC/AHA/HRS CRT indications
Class Rhythm Conduction defect
LVEF (%) QRS width (ms)
NYHA Others
I Sinus LBBB ≤35 ≥150 II-IV GDMT
IIa Sinus LBBB ≤35 120-149 II-IV GDMT
Sinus Non-LBBB ≤35 ≥150 III-IV GDMT
IIb Sinus LBBB ≤30 ≥150 I ICM
Sinus Non-LBBB ≤35 120-149 III-IV GDMT
Sinus Non-LBBB ≤35 ≥150 II GDMT
III Non-LBBB <150 I-II
Class Rhythm LVEF(%) Special conditionIIa Afib ≤35 Required VP or control V rate with VP 100%
≤35 Pacing indicated, VP>40%
ACC/AHA DBT guidelines, 2012
IIA
Class II, IIB
Class II, III
ICD
CRT-D CRT-D
Thank you for your attention