BENEFIT OF CRT IN MILDLY SYMPTOMATIC HEART FAILURE RECENT DATA FROM MADIT-CRT AND RAFT
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1 BENEFIT OF CRT IN MILDLY SYMPTOMATIC HEART FAILURE RECENT DATA FROM MADIT-CRT AND RAFT Ilan Goldenberg MD Professor of Cardiology Sheba Medical Center and Tel Aviv University, Israel University of Rochester Medical Center, Rochester NY, USA
2 POINTS FOR DISCUSSION Reverse remodeling and subsequent outcomes Effect in subgroups Effect on ventricular and atrial tachyarrhythmias
3 REVERSE REMODELING AND DYSSYNCHRONY
4 1820 ICM/NICM pts: EF 30% QRS 130 msec NYHA I/II Randomization: BACKGROUND: MADIT-CRT Moss et al. NEJM, 2009 CRT-D vs. ICD-only 3:2 ratio Outcome: HR=0.66 (p=0.001)
5 MADIT-CRT: ECHO RESPONSE Solomon et al et al. Circulation, 2010 Improvement at 1 yr: LVEDV LVESV LAV LVEF
6 MADIT-CRT: ECHO RESPONSE AND SUBSEQUNT CLINICAL RESPONSE Solomon et al et al. Circulation, 2010
7 MADIT-CRT: LEFT ATRIUM AND SUBSEQUNT CLINICAL OUTCOME Goldenberg et al. Unpublished
8 MADIT-CRT: RIGHT VENTRICLAR REMODELING Solomon et al et al. Circulation HF, 2012
9 MADIT-CRT: DYSSYNCHRONY Solomon et al. European Heart Journal, 2011
10 MADIT-CRT: DYSSYNCHRONY Solomon et al et al. European Heart Journal, 2011
11 CLINICAL EFFICACY IN SUBGROUPS
12 MADIT-CRT: SUBGROUP ANALYSIS Differential clinical response: Gender QRS duration Differential echo response: Ischemic vs. non ischemic CMP Moss et al. NEJM, 2009
13 MADIT-CRT: QRS MORPHOLOGY Zareba et al. Circulation, 2011 LBBB Non-LBBB RBBB IVCD
14 MADIT-CRT: QRS MORPHOLOGY Zareba et al. Circulation, 2011 LBBB Non-LBBB RBBB IVCD
15 1798 ICM/NICM pts: EF 30% QRS 120 msec NYHA II/III Randomization: CRT-D vs. ICD-only 1:1 ratio Outcome: HR=0.68 (p<0.001) RAFT Tang et al. NEJM, 2010
16 RAFT: SUBGROUP ANALYSIS Tang et al. NEJM, 2010 Differences in clinical response: QRS duration QRS morphology Gender
17 2012 UPDATED GUIDELINES
18 PREDICTORS OF RESPONSE IN MADIT-CRT Goldenberg et al. Circulation, 2011 Individual factors may contribute differently to the clinical response to CRT Echocardiographic response correlated with clinical response in MADIT-CRT Combined assessment of factors associated with a favorable echo response can identify patients who derive clinical benefit from CRT-D
19 STUDY DESIGN Fig. 1 Study Design: Flow-Diagram* Step I: Derivation Analyses (Identification of response factors) Step III: Validation Analyses (yield of response score for assessment of clinical CRT-D benefit) Sample: CRT-D patients with paired echo data Sample: All study patients with complete baseline data Unavailable: 371 pts (87 events) Available: 718 patients (101 events) Available: 1761 patients (367 events) Unavailable: 59 patients (10 events) Identification of 7 echo response factors to CRT-D Step II: Construction of response score Evaluation of CRT-D vs. ICD reduction in clinical events by response score
20 STEP I: FACTORS ASSOCIATED WITH ECHO RESPONSE TO CRT-D* Incremental Response (SE) P-value Score Female -2.9% (1.0%) Non-ischemic -4.2% (0.9%) < QRS 150 msec -2.7% (0.9%) LBBB -3.4% (1.0%) < Prior HF hospitalization -1.9% (0.8%) Baseline LAV <40 ml/m 2-4.2% (1.1%) < Baseline LVEDV 125 ml/m 2-5.6% (1.0%) < *Results are obtained from a best subsets analysis that included 25 prespecified clinical and echocardiographic candidate factors
21 STEP II: CONSTRUCTION OF RESPONSE SCORE Response score range 0 to 14 Pts categorized into approximate quartiles based on the distribution of the response scores: Group 1 (n=391): Q1 score 0-4 Group 2 (n=401): Q2 score 5-6 Group 3 (n=469): Q3 score 7-8 Group 4 (n=500): Q4 score 9-14
22 PERCENT CHANGE IN LVEDV BY RESPONSE GROUP Response Group % Change in LVESV P <0.001
23 PERCENT CHANGE IN LVESV BY RESPONSE GROUP Response Group % Change in LVESV P <0.001
24 CLINICAL BENEFIT BY SCORE GROUP GROUP SCORE 1 (Q1 2SCORE: 0-4) GROUP SCORE 2 (Q2 = 3SCORE: 5-6) GROUP 3 (Q3 SCORE 7-8) GROUP 4 (Q4 SCORE 9)
25
26 LEAD POSITION IN MADIT-CRT Singh et al. Circulation 2011
27 LEAD POSITION IN MADIT-CRT Singh et al. Circulation 2011
28 LEAD POSITION IN MADIT-CRT Limitations No difference in echo response (somewhat better in apical) 110 pts with apical lead position; 24 HF/death events Endpoint driven primarily by mortality (total=10; noncardiac =4) Within CRT-D difference, without comparison to ICD group
29 EFFECT ON ARRHYTHMIAS
30 REVERSE LV REMODELING AND SUBSEQUENT VENTRICULAR TACHYARRHYTHMIAS; Barsehshet/Goldenberg et al. JACC 2011
31 REVERSE LV REMODELING AND SUBSEQUENT VENTRICULAR TACHYARRHYTHMIAS; Barsehshet/Goldenberg et al. JACC 2011
32 REVERSE LV REMODELING AND SUBSEQUENT VENTRICULAR TACHYARRHYTHMIAS; Barsehshet/Goldenberg et al. JACC 2011
33 RECURRENT VENTRICULAR TACHYARRHYTHMIAS; Oullet/Goldenberg et al. JACC 2012
34 RECURRENT VENTRICULAR TACHYARRHYTHMIAS; Oullet/Goldenberg et al. JACC 2012
35 REVERSE LA REMODELING AND SUBSEQUENT ATRIAL TACHYARRHYTHMIAS; Brenyo/Goldenberg et al. JACC 2011
36 REVERSE LA REMODELING AND SUBSEQUENT ATRIAL TACHYARRHYTHMIAS; Brenyo/Goldenberg et al. JACC 2011
37 TAKE HOME MESSAGES: CRT IN MILD HF PTS Clinical benefit directly related to reverse remodeling of LV/LA No evidence for clinical benefit in non-lbbb pts No evidence for difference in efficacy within LBBB pts by QRS width Combined assessment can be used to identify enhanced responders Data regarding apical lead position require further validation
38 TAKE HOME MESSAGES: CRT IN MILD HF PTS Reverse remodeling effects on LV are directly related to reduced risk for ventricular tachyarrhythmias Reverse remodeling effects on LA are directly related to reduced risk for atrial tachyarrhythmias CRT may increase recurrent VA risk in non-lbbb patients (NYHA I/II)
39 Thank You
Arthur J. Moss, MD Professor of Medicine/Cardiology University of Rochester Medical Center Rochester, NY. DISCLOSURE INFORMATION Arthur J.
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DOI: /
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