Dipartimento di Cardiologia Arcispedale S. Anna Azienda ... · Dipartimento di Cardiologia...
Transcript of Dipartimento di Cardiologia Arcispedale S. Anna Azienda ... · Dipartimento di Cardiologia...
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Fibrillazione atriale persistente e Fibrillazione atriale asintomatica
Rischio di strokeClaudio Pratola Matteo BertiniU.O. Cardiologia
Dipartimento di CardiologiaArcispedale S. Anna
Azienda Ospedaliero-UniversitariaCona-Ferrara
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AF
ELECTRICAL
MECHANICAL STRUCTURAL
Ca Channels
Intra-atrial circuits
Stretching
AP duration
Refractory period
Conduction velocity
Contractility
Compliance
Dilatation Connessin
Fybrosis
Anisotropy
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AF physiopathology
remodeling
- Atrial refractory period shortening
- Contractility reduction
- Conduction velocity reduction
- Atrial chamber dilatation
- Fibrosis (point of no return.?.)
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Paroxysmal atrial fibrillation..is it always the same?
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Atrial fibrillation
• Similar patients with different presentations (3P)
• Different patients with the same presentation
• Variable symptoms
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Types of Atrial Fibrillation
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(19(19thth Ann Scientific Sessions NASPE, 1998)Ann Scientific Sessions NASPE, 1998)
100100
8080
6060
4040
2020
00SincopeSincope Effort Effort
intoleranceintolerance
Paz
ient
s (%
)P
azie
nts
(%)
AnginaAngina DizzinessDizziness Dyspnoea Dyspnoea
1414
29293333
4949
6868 6969
7878
FatigueFatigue PalpitationsPalpitations
Symptoms
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(Levy S et al. Circulation 1999; 99. 3028(Levy S et al. Circulation 1999; 99. 3028 --35) 35)
SymptomsSymptoms in AF in AF patientspatients
PalpitationPalpitation
Thoracic painThoracic pain
DyspnoeaDyspnoea
SincopeSincope
FatigueFatigue
OthersOthers
No symptomsNo symptoms
ALFA ALFA studystudy
Total Total
populationpopulation
% (n=756)% (n=756)
54,154,1
10,110,1
44,444,4
10,410,4
14,314,3
0,90,9
11,411,4
Paroxysmal Paroxysmal
AFAF% (n=167)% (n=167)
79,079,0
13,213,2
22,822,8
17,417,4
12,612,6
00
5,45,4
ChronicChronic
AFAF% (n=389)% (n=389)
44,744,7
8,2 8,2
46,846,8
8,08,0
13,113,1
1,81,8
16,216,2
Recent onset Recent onset
AFAF
% (n=200)% (n=200)
51,5 51,5
11,011,0
58,058,0
9,59,5
18,018,0
00
7,07,0
SintomiSintomi
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30% 30% -- 45%45%
12:112:1
AF as an occasional findingAF as an occasional finding
AF: asymptomatic/symptomatic episodesAF: asymptomatic/symptomatic episodes
(Page RL et al. Circulation 1994)(Page RL et al. Circulation 1994)
(Furberg CD et al. Am J Cardiol 1994; Blackshear JL et al. MPC 1(Furberg CD et al. Am J Cardiol 1994; Blackshear JL et al. MPC 1 996)996)
70% no sympotms70% no sympotms
AF: asymptomatic vs symptomatic relapsesAF: asymptomatic vs symptomatic relapses
(PAFAC TRIAL, Late Breaking Trial, ESC 2002)(PAFAC TRIAL, Late Breaking Trial, ESC 2002)
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AFFIRM STUDY
0
10
20
30
40
50
60
70
80
1 2
rate control rhythm control
Pat
ient
s
34%
62%
Sinus rhythm after five years
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Non-Valvular Atrial Fibrillation
• Affects 1-1.5% of population in developed world
• Lifetime risk in men & women >40 is 1 in 4
• Prevalence• 0.5% age 0-59
• 9.0% age >80
• Currently 2.5 million adults in U.S.
Savelieva: J Intern Med 250, 2001Savelieva: J Intern Med 250, 2001Go: JAMA 285, 2001Go: JAMA 285, 2001Miyasaka: Circ 114, 2006Miyasaka: Circ 114, 2006
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Non-Valvular Atrial Fibrillation
An EPIDEMIC
3000838-6
0
2
4
6
8
10
12
14
16
1990 1995 2000 2005 2010 2015 2020 2025 2030 2035 2040 2045 2050
Mayo Clinic data (assuming a Mayo Clinic data (assuming a continued increase in AF continued increase in AF incidence)incidence)Mayo Clinic data (assuming further Mayo Clinic data (assuming further increase in AF incidence)increase in AF incidence)ATRIA study data (50% >80 yo)ATRIA study data (50% >80 yo)
Patients Patients with atrial with atrial fibrillation fibrillation (millions)(millions)
YearYear
2.08 2.26 2.44 2.66 2.943.33
3.8 4.344.78 5.16 5.42 5.61
5.1 5.66.1
6.87.5
8.4
9.410.3
11.111.7 12.1
5.15.9
6.7
7.78.9
10.2
11.7
13.1
14.315.2
15.9
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0
5
10
15
20
25
30
35
50-59 60-69 70-79 80-89
Non-Valvular Atrial Fibrillation
%%
Percent of Total StrokesPercent of Total StrokesAttributable to Atrial FibrillationAttributable to Atrial Fibrillation
Stroke 22(18), 1991Stroke 22(18), 1991
• 500,000 strokes/year in U.S.
• Up to 20% of ischemic strokes occur in patients with atrial fibrillation
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Conditions predisposing to, or encouraging progression of AF
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Risk factors for stroke andthrombo -embolism in non -valvular AF
AF= atrial fibrillation; EF = ejection fraction (as documented by echocardiography, radionuclide ventriculography, cardiaccatheterization, cardiac magnetic resonance imaging, etc.); LV = left ventricular; TIA = transient ischaemic attack.
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Risk factor-based point-based scoring system - CHA 2DS2-VASc
*Prior myocardial infarction, peripheral artery disease, aortic plaque. Actual rates of stroke in contemporary cohorts may vary from these estimates.
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Adjusted stroke rate according to CHA 2DS2-VASc score
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The management cascade for patients with AF
ACEI = angiotensin-converting enzyme inhibitor; AF = atrial fibrillation; ARB = angiotensin receptor blocker;PUFA = polyunsaturated fatty acid; TE = thrombo-embolism.
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Approach to thromboprophylaxis in AF
AF = atrial fibrillation; CHA2DS2-VASc = cardiac failure, hypertension, age ≥ 75 (doubled), diabetes, stroke (doubled)-vascular disease, age 65–74 and sex category (female); INR = international normalized ratio; OAC = oral anticoagulation, such as a vitamin K antagonist (VKA) adjusted to an intensity range of INR 2.0–3.0 (target 2.5).
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The HAS-BLED bleeding risk score
*Hypertension is defined as systolic blood pressure > 160 mmHg.
INR = international normalized ratio.
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Use of oral anticoagulation forstroke prevention in AF
AF = atrial fibrillation; OAC = oral anticoagulant; TIA = transient ischaemic attack.
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Prevention of thromboembolism in AF
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Prevention of thromboembolism in AF
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Cardioversion, TOE and anticoagulation
AF = atrial fibrillation; DCC = direct current cardioversion; LA = left atrium; LAA = left atrial appendage; OAC = oral anticoagulant;SR= sinus rhythm; TOE= transoesophageal echocardiography.AF = atrial fibrillation; DCC = direct current cardioversion; LA = left atrium; LAA = left atrial appendage; OAC = oral anticoagulant;SR= sinus rhythm; TOE= transoesophageal echocardiography.
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Monitoring
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CONFIRM™ REVEAL®
Volume 7cc 9cc
Mass 15g 15g
Length 56.3mm 62mm
Width 18.4mm 19mm
Thickness 7.5mm 8mm
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Non-Valvular Atrial Fibrillation Stroke Prevention
3000838-10
Cooper: Arch Int Med 166, 2006Cooper: Arch Int Med 166, 2006Lip: Thromb Res 118, 2006Lip: Thromb Res 118, 2006
• Warfarin cornerstone of therapy• Assuming 51 ischemic strokes/1000 pt-yr
– Adjusted standard dose warfarin prevents 28 strokes at expense of 11 fatal bleeds
– Aspirin prevents 16 strokes at expense of 6 fatal bleeds
• Warfarin– 60-70% risk reduction vs no treatment– 30-40% risk reduction vs aspirin
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3000838-12
Non-Valvular Atrial Fibrillation Stroke Prevention
Warfarin Problematic
• Narrow therapeutic window– Multiple drug-drug/drug-food interactions– Genetic variability
• Long half-life
• PCI issues – triple therapy
• Compliance
• Contraindications
• Bleeding risks
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010203040506070
<55 55-64 65-74 75-84 85
Non-Valvular Atrial Fibrillation Warfarin Use in AF Patients by Age
3000838-13
%%
Ann Int Med 131(12), 1999Ann Int Med 131(12), 1999
≥≥≥≥• Only 55% of AF patients with no contraindications have
evidence of warfarin use in previous 3 months
• Other studies cite warfarin use in AF patients from 17-50%
• Elderly patients with increased absolute risk least likely to betaking warfarin
• Contraindications 30-40%
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0 20 40 60 80 100
Non-Valvular Atrial Fibrillation Adequacy of Anticoagulation in Clinic
3000838-14
%%
Bungard: Pharmacotherapy 20:1060, 2001Bungard: Pharmacotherapy 20:1060, 2001
Low INR <1.6Low INR <1.6
TherapeuticTherapeuticINR 2INR 2--33
High INR >3.2High INR >3.2
Efficacy Efficacy ↓↓↓↓↓↓↓↓ 44--foldfold
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Non-Valvular Atrial FibrillationStroke Pathology
3000838-15
Brass. Stroke 28(12), 1997Brass. Stroke 28(12), 1997VanWalraven: JAMA 288, 2002VanWalraven: JAMA 288, 2002
• Major fatal bleed with age >75 = 3%/year (30% over 10 years)
• Intracranial hemorrhage– 0.3-0.5%/100 patient-years
– 3% in INR >4.0– 10% if INR >4.5
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Costo efficacia dei nuovi anticoagulanti
• Giornate lavorative• Spesa del Sistema Sanitario in termini
di controlli • Cardioversione• Preparazione a procedura ablativa• Ripresa della terapia anticoagulante e
dimissione