atrial fibrillation - scott & white hospital · –critically ill •symptomatic...
TRANSCRIPT
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Atrial Fibrillation
Javier E. Banchs MD, FACC, FHRS
Baylor Scott & White Health
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Objectives
• Review the clinical presentations and
treatment targets in AF
• Understand modifiable risk factors in Atrial
Fibrillation (AF)
• Discuss stroke prevention strategies in AF
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A new paradigm in Medicine
“My Apple Watch shows my heart rate is
cero during my exercise”
2
…consumer electronics meets Health Care
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The Apple Heart Study
4
N Engl J Med 2019;381:1909-17.
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The Apple Heart Study
5
N Engl J Med 2019;381:1909-17.
• 419,297 volunteers consented via iPhone
App
– 2,161 (0.52%) irregular heart rhythm
– 450 returned ECG patches
– 34% confirmed atrial fibrillation
– PPV 0.84
– 57% patients sought attention outside study
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The Apple Heart Study
6
N Engl J Med 2019;381:1909-17.
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Clinical presentation of AF
• Asymptomatic– Wellness monitoring
– Incidental finding
– Stroke
– Critically ill
• Symptomatic– Palpitations, tachycardia, chest discomfort,
dyspnea, syncope
– Tachycardia induced cardiomyopathy
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Asymptomatic AF
• Diagnosis confirmation
– ECG
– Ambulatory heart rhythm monitoring
• Patient education
• Treatment
– Risk Factors Modification
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Asymptomatic AF
• Diagnosis confirmation
– ECG
– Ambulatory heart rhythm monitoring
• Patient education
• Treatment
– Risk Factors Modification
– Additional treatment?
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Asymptomatic AF
• Diagnosis confirmation
– ECG
– Ambulatory heart rhythm monitoring
• Patient education
• Treatment
– Risk Factors Modification
– Additional treatment (AF burden)
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How Much AF is too Much AF?
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Subclinical AF and Stroke
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0 1 2 ≥ 3
NO or < 5 min
1.7% 0% 0% 25%
5 min - < 24h 1.8% 1.3% 2.4% 0%
> 24h 0% 4.4% 4.4% 33%
CHADS2 Score
AT/A
F D
ura
tio
n
568 patients followed x 1 year with PPM and history of AF
P=0.0355%
0.8%
Botto GL et al. J Cardiovasc Electrophysiol. 2009 Mar;20(3):241-8
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Tachycardia Induced Cardiomyopathy
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Natural History of Atrial Fibrillation
Guidelines for the management of atrial fibrillation (ESC)Eur Heart J. 2010 Oct;31(19):2369-429
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Symptoms in AF
• Symptoms
– Tachycardia
– Irregular rhythm
– Cardiomyopathy
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Treatment of AF
• Risk factors modification
• Rate control
• Rhythm control
• Stroke prevention
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Pathophysiology
GENES
ENVIRONMENT
LEFT ATRIAL DILATATION / REMODELINGAUTONOMIC IMBALANCE / HUMORAL ACTIVATION
INFLAMMATION / FIBROSISAUTOMATICITY / TRIGGERED ACTIVITY - SLOW CONDUCTION
SUBSTRATEMultipleReentry
TRIGGERSPACs
Atrial TachycardiaSVT
HEART DISEASE
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Risk Factors Modification
• HTN
• CAD
• Obesity
• Obstructive Sleep apnea
• Exercise
• Alcohol
• Smoking
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AF Risk Factors
19
Population attributable fraction of major risk factors for atrial
fibrillation in the Atherosclerosis Risk in Communities study
Huxley RR et al. Circulation. 2011;123:1501–1508.
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Voskoboinik A, et al. JACC 2016;68:2567-2576
Alcohol
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Exercise – or lack of
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Morseth B, et al. Eur Heart J. 2016 Aug 1; 37(29):2307-13
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Smoking
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• Women’s Health Study 20,822
HR 1.2 (1.06-1.57)
• CHARGE AF 18,556
HR 1.44 (1.20-1.72)
Everett BM, et al Eur Heart J 2013; 34: 2243–51
Alonso A, et al. J Am Heart Assoc 2013; 2: e000102
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Obstructive Sleep Apnea
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Gami AS, et al. Circulation. 2004;110:364-367
Adjusted OR and 95% CI for association between AF and OSA
Proportion and 95%
CI of patients with OSA
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Obesity
Pathak RK, et al. J Am Coll Cardiol 2015;65:2159–69
46%
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Pathak RK, et al. JACC 2014;64:2222-2231
Arrest AF
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Treatment
• Risk factors modification
• Rate control
• Rhythm control
• Stroke prevention
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Rate Control
• Prevention of tachycardia induced
cardiomyopathy
• Symptoms relief
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Rate control interventions
• Beta blockers
• Calcium channel blockers
• Digoxin
• Amiodarone
• AV node ablation
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Target Rate
Race II Trial
Van Gelder IC et al. N Engl J Med 2010;362:1363-73
614 patients
HR<80 bpm
HR<110 bpm
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Treatment
• Risk factors modification
• Rate control
• Rhythm control
• Stroke prevention
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Rhythm control
• Cardioversion
– TEE guided
– AC x 3 weeks
• Antiarrhythmic drugs
– Flecainide and propafenone
– Dronedarone
– Sotalol
– Dofetilide
– Amiodarone
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Antiarrhythmic Drugs
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January CT et al. J Am Col Cardiol 2014; 64:e1–76* may increase morality – (pooled data)
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2014 AHA/ACC/HRS Guidelines
January CT et al. JA C C V OL . 6 4 , N O . 2 1 , 2 0 1 4 : e 1 – 7 6
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Rhythm control
• Catheter based ablation
– Radiofrequency ablation
– Cryoballoon ablation
– Surgical
– Hybrid
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Radiofrequency ablation
Kuck KH, et alN Engl J Med 2016;374:2235-45
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Cryoballoon Ablation
Kuck KH, et alN Engl J Med 2016;374:2235-45
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Cryoballoon Vs. Radiofrequency
Kuck KH, et alN Engl J Med 2016;374:2235-45
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CABANACatheter Ablation Versus Antiarrhythmic Drug therapy for Atrial
Fibrillation Trial
• Randomized open label AF Ablation Vs.
Drug Therapy
• International 126 sites
• 2,204 patients
• Primary endpoint: composite of death,
stroke, bleeding, cardiac arrest
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JAMA. 2019;321(13):1261-1274.
Cumulative risk of death, disabling stroke, serious bleeding, or cardiac
arrest (primary end point by intention-to-treat analysis)
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Cumulative risk of death, disabling stroke, serious bleeding, or cardiac
arrest (primary end point) per-protocol analysis
40
JAMA. 2019;321(13):1261-1274.
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Freedom from recurrence of AF following the blanking period in 1240
patients who used the study electrocardiogram event recorders
41
JAMA. 2019;321(13):1261-1274.
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CABANACatheter Ablation Versus Antiarrhythmic Drug therapy for Atrial
Fibrillation Trial
• “On treatment”
• Primary endpoint on treatment: 7% (ABL)
Vs. 10.9% p=0.006
• 33% reduction
• 40% mortality risk reduction with ablation
(7.5% Vs 4.4%)
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Treatment
• Risk factors modification
• Rate control
• Rhythm control
• Stroke prevention
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Stroke Prevention
• Risk Assessment
• Anticoagulation
– Warfarin
– DOAC
• Left atrial appendage occlusion
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Lyp GYH, et al. CHEST 2010; 137(2):263–272ESC Guidelines. Eur Heart J. 2010 Oct;31(19):2369-429
Risk of Thromboembolism
CHA2DS2-VASc
Heart Failure 1HTN 1Age:
65 175 2
Diabetes 1Stroke/TIA 2Vascular Dz 1Sex Fem 1
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Dabigatran
Connolly SJ. et al. N Engl J Med 2009;361:1139-51
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Patel M. R. Et al. ROCKET AF. N Engl J Med 2011;365:883-91
Rivaroxaban
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Granger CV et al. ARISTOTLE. N Engl J Med 2011;365:981-92
Apixaban
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N Engl J Med 2013;369:2093-104
ENGAGE AF-TIMI 48
Edoxaban
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“Valvular” AF
• Evaluated heart valve = rheumatic or
artificial (Type I)
– Moderate-severe rheumatic Mitral stenosis
– Mechanical prosthetic valves
• Evaluated heart valve = rheumatic or
artificial (Type II)
– All others
Lip, et al. Europace (2017) 19, 1757–1758
WARFARIN
WARFARIN OR DOAC
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“Valvular” AF
• Evaluated heart valve = rheumatic or
artificial (Type I)
– Moderate-severe rheumatic Mitral stenosis
– Mechanical prosthetic valves
• Evaluated heart valve = rheumatic or
artificial (Type II)
– All others
Lip, et al. Europace (2017) 19, 1757–1758
WARFARIN
WARFARIN OR DOAC
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Pollack Jr et al. N Engl J Med 2015;373(6):511-20.
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N Engl J Med 2019;380:1326-35.
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Alternatives to Anticoagulation
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Watchman Amplatzer(Amulet)
Lariat
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Watchman
• CHA2DS2-Vasc score 3 or higher
• CHADS2 score 2 or higher
• Candidate for anticoagulation
• Reason to seek an alternative to long term
anticoagulation
• No LAA thrombus
• Favorable LAA anatomy
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Protect AF and PREVAIL 5 years
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J Atr Fibrillation. 2018 Dec; 11(4): 2119.
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2 year follow up EWOLUTION trial
Circ Arrhythm Electrophysiol. 2019;12:e006841
No AC in 72%
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Natural History of Atrial Fibrillation
Guidelines for the management of atrial fibrillation (ESC)Eur Heart J. 2010 Oct;31(19):2369-429
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Conclusions
• Treatment of AF is centered on risk factors
modification, stroke prevention, rate control
and suppression of symptoms
• Direct oral anticoagulants are preferred
over warfarin for stroke prevention
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Conclusions
• Left atrial appendage occlusion is not
inferior and may be superior to warfarin for
stroke prevention in patients with AF
seeking an alternative to long term AC
• Catheter based ablation and antiarrhythmic
agents could be effective in rhythm control
but recurrence rates remain high
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Additional Slides
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Clinical Trials - First Line Randomized Multicenter ABL Vs. AAD
Trial Year N AF F/U Succ.ABL
Succ.AAD
Comp.ABL
Comp.AAD
RAAFT 2005 70 PAF 12 m 87%* 34% 9% 11%
MANTRA-PAF 2012 294 PAF 24 m 13%AF 19%AF 17% 15%
RAAFT-2 2014 127 PAF 24 m 45%* 28% 9% 4.9%
Calkins H et al. Heart Rhythm 2017;14:e275–e444)
*p<0.04
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Hakalahti A et al. Europace (2015) 17, 370–378
Clinical Trials - First Line Randomized Multicenter ABL Vs. AAD
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Ablation Vs. Drug Therapy
Khan AR et al. Circ Arrhythm Electrophysiol. 2014;7:853-860Copyright © American Heart Association, Inc. All rights reserved.
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CABANACatheter Ablation Versus Antiarrhythmic Drug therapy for Atrial
Fibrillation Trial
• Primary endpoint: 8 (ABL) Vs. 9.2 %
• 17% mortality or CV hosp reduction with
ablation (58.1% Vs 51.7%) p=0.001
• 47% reduction in AF recurrence p<0.0001
• 9.2% did not have ablation; 27.5%
crossover from drug to ablation
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10 years follow up
Kawaji T. et al. International Journal of Cardiology 249 (2017) 204–213