atrial fibrillation and stroke...no scaf >6mins~6hrs >6hrs~24hrs >24hrs no. at risk no scaf...
TRANSCRIPT
![Page 1: Atrial fibrillation and stroke...No SCAF >6mins~6hrs >6hrs~24hrs >24hrs No. at Risk No SCAF >6mins~6hrs >6hrs~24hrs >24hrs 2455 1926 1708 1528 1251 900 624 390 0 226 302 347 322 281](https://reader030.vdocument.in/reader030/viewer/2022013100/6090da9d7bfe832af83eaa78/html5/thumbnails/1.jpg)
Isabelle C Van Gelder
University Medical Center Groningen
The Netherlands
Atrial fibrillation and stroke
ESC stroke council Prague January 2018
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Content
Stroke – what is the problem for patients with AF ?
Does abolishing AF prevents stroke ?
Is AF a mechanism or just a marker for stroke ?
AF is progressive disease and AF progression is
associated with stroke, heart failure and mortality
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Content
Stroke – what is the problem for patients with AF ?
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AF and HRs for stroke and other vascular events
Emdin Int J Epidemiol 2016
Haemorrhagic stroke
Ischemic stroke
Unspecified stroke
Ischemic heart disease
Heart failure
Peripheral artery disease
Aortic aneurysm
Chronic kidney disease
Vascular dementia
Any vascular event
2.52
3.8
2.72
1.42
2.22
2.59
2.09
1.57
2.15
Primary care research database, UK population (87% white)Linked with secondary care data and cause-specific mortality data
4.3 million adults, included at standard GP with 1 RR 1990-2013 FU 7 yrs
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Individuals with stroke
Stroke in rhythm versus rate control studies
Healey RE-LY registry Lancet 2016
47 countries – 15.400 AF pts
admitted to emergency dept
1 year follow-up
11% died: 6% with primary AF;
16% with secondary AF
4% had stroke: 3% vs 5%
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Content
Stroke – what is the problem for patients with AF ?
Does abolishing AF prevents stroke ?
![Page 7: Atrial fibrillation and stroke...No SCAF >6mins~6hrs >6hrs~24hrs >24hrs No. at Risk No SCAF >6mins~6hrs >6hrs~24hrs >24hrs 2455 1926 1708 1528 1251 900 624 390 0 226 302 347 322 281](https://reader030.vdocument.in/reader030/viewer/2022013100/6090da9d7bfe832af83eaa78/html5/thumbnails/7.jpg)
New drug targets for AF - Outline
32% rhythm control3% rate control
3% rhythm control4% rate control
28% rhythm control31% rate control
43% rhythm control46% rate control
CV death, stroke, worsening HF
Roy et al. AF-CHF New Engl J Med 2008
Stroke
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Kirchhof Am Heart J 2013
Early treatment of AF for Stroke prevention Trial EAST
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Content
Stroke – what is the problem for patients with AF ?
Does abolishing AF prevents stroke ?
Is AF a mechanism or just a marker for stroke ?
![Page 10: Atrial fibrillation and stroke...No SCAF >6mins~6hrs >6hrs~24hrs >24hrs No. at Risk No SCAF >6mins~6hrs >6hrs~24hrs >24hrs 2455 1926 1708 1528 1251 900 624 390 0 226 302 347 322 281](https://reader030.vdocument.in/reader030/viewer/2022013100/6090da9d7bfe832af83eaa78/html5/thumbnails/10.jpg)
Temporal disconnect
Parekh et al. Circ 2006
VKA therapy
monitoring
Brambatti for the ASSERT Investigators Circulation 2014
stroke
monitoring
VKA therapy
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AF: mechanism or marker for stroke ?
SCAF episodes are associated with AF but
only a minority had SCAF in the month
before their stroke
Brambatti for the ASSERT Investigators Circulation 2014
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AF and stroke – mechanism more complicated
Vascular
risk
factors
Atrial
myopathy
Hyper-
coagulability
and other
mechanisms
Atrial
fibrillation
Stroke
and
AF
progression
AF: mechanism or marker for stroke ?
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Content
Stroke – what is the problem for patients with AF ?
Does abolishing AF prevents stroke ?
Is AF a mechanism or just a marker for stroke ?
AF is progressive disease and AF progression is
associated with stroke, heart failure and mortality
![Page 14: Atrial fibrillation and stroke...No SCAF >6mins~6hrs >6hrs~24hrs >24hrs No. at Risk No SCAF >6mins~6hrs >6hrs~24hrs >24hrs 2455 1926 1708 1528 1251 900 624 390 0 226 302 347 322 281](https://reader030.vdocument.in/reader030/viewer/2022013100/6090da9d7bfe832af83eaa78/html5/thumbnails/14.jpg)
AF progression is associated with vascular risks
De Vos, Crijns, Euro Heart Survey JACC 2010 AF progression No AF progression p value
CV admissions (%) 71 % 50 % <0.001
Stroke 6 % 2 % 0.003
CV mortality 7 % 3 % 0.005
n FU, years AF progression
Euro Heart Survey AF, 2010 1219 1 15%
Record-AF, 2012 2137 1 15%
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Risk of ischemic stroke or embolism in SCAF
Healey New Engl J Med 2012 ASSERT Study
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Longer subclinical AF: higher risk of stroke
Van Gelder, Healey for the ASSERT Investigators Eur Heart J 2017
Years of Follow-up
Cu
mu
lative
even
t ra
tes
0.0
0.0
50
.10
0.1
50
.20
0 0.5 1 1.5 2 2.5 3 3.5
No SCAF>6mins~6hrs>6hrs~24hrs>24hrs
No. at Risk
No SCAF
>6mins~6hrs
>6hrs~24hrs
>24hrs
2455 1926 1708 1528 1251 900 624 390
0 226 302 347 322 281 218 155
0 88 104 103 108 93 80 52
0 91 124 144 140 126 116 85
SCAF > 24 hours
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Stroke is still a significant problem in AF, next to heart
failure
Mechanism of stroke in AF still not completely known
AF mechanism or bystander of stroke, anyway AF often
increases risk of stroke
Conclusions
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CHA2DS2-VASc score:
- Not static
- Most pts with ischemic
stroke developed ≥1
new stroke risk factor
Chao JACC 2018
CHA2DS2-VASc score is not static !
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Content
Stroke – what is the problem for patients with AF ?
Does abolishing AF prevents stroke ?
Is AF a mechanism or just a marker for stroke ?
AF is progressive disease and AF progression is
associated with stroke, heart failure and mortality
Hypercoagulability not only mechanism of stroke but
also of AF progression ?
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Hypercoagulability and remodeling
RAASCellular Ca2+-
overloadEndothelin-1
Natriuretic
peptides
Heat shock
proteins
Structural Remodeling
Enlarged atria Hypertrophy Fibrosis Dedifferentiation Apoptosis Myolysis
Electrical
Remodeling
Associated
disease
Atrial
Fibrillation
Atrial
Fibrillation
+ + + ++
+ + + - -
Inflammation
oxidative stress
+
+
Focal triggers
of AF
Thrombin
activation
De Jong, Cardiovasc Res, 2011
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Hypercoagulability represents a so far unrecognized key
mechanism in atrial remodeling and AF progression
Hypercoagulability and remodeling
Spronk et al. Eur Heart J 2016
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Hypercoagulability associated
with atrial remodeling
Spronk et al. Eur Heart J 2016
Hyper-
coagulability
Xa
ThrombinCardiac fibroblast
TGF-β
IL-6
MCP-1
Pro-fibrotic and
inflammatory
cytokines
Dedifferentiation
(Myofibroblasts)
Collagen synthesis
+200% +120%Thrombin (0.01U/ml)
MCP-1
Thrombin + Dabigatran ns ns ns+72%
α-SMA 3H-proline incorporation
Fibroblasts
incubated with
thrombin
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Thrombin promotes AF
0
20
40
60
80
Wt TMpro/pro
1/10
6/10
c2 p<0.01
AF inducible
(%)
Wt burst normal sinus rhythm
P
QRS
TMpro/pro atrial fibrillation
QRS
P
burst
0.1
1
10
100
1000
TMpro/pro Wt
AF duration
(s)
0
p<0.01
0.5 s
A
B C TMpro/pro Wt
Ctr Ctr
Ctr
Ctr Ctr
Ctr
Spronk et al. Eur Heart J 2016
TM pro/pro
transgenic mice
with enhanced
thrombin activity
(hypercoagulable
phenotype)
Wildtype mice
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Spronk et al. Eur Heart J 2016
Stroke and other MACCE
PAR stimulation
Atrial remodeling *
AF progression
Thrombin activation
TGF-β
* Capillary rarefaction, Inflammation, Myocyte death, Fibroblast proliferation, Fibrosis, Dispersion of conduction & repolarisation
AF Hypertension, heart failure
MCP-1
IL-6
Hypercoagulability and remodeling
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Hypercoagulability is one of the key mechanisms in AF
progression (permanent AF and CV morbidity and
mortality)
Hypercoagulability varies depending on duration of AF
and severity of the underlying vascular diseases
Thrombin inhibitors, Factor Xa inhibitors and vitamin K
antagonists differ with respect to prevention of AF
progression
Hypothesis RACE V
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Study design RACE V
Multicenter, prospective, observational study
750 patients with self-terminating AF
Extensive phenotyping and characterization
Continuous rhythm monitoring
Total inclusion duration 2 years
Total follow-up 2.5 years
Main study endpoint AF progression
Expected AF progression rate 10%/ year 187 AF
progression events
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Medtronic Reveal LINQ Medtronic Advisa Pacemaker
CareLink system
Continuous rhythm monitoring RACE V
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65 year old female
Symptomatic atrial fibrillation
Risk factor for AF hypertension
Near collaps ~19.15 h
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Content
Stroke – what is the problem for patients with AF ?
Does abolishing AF prevents stroke ?
Is AF a mechanism or just a marker for stroke ?
AF is progressive disease and AF progression is
associated with stroke, heart failure and mortality
Hypercoagulability not only mechanism of stroke but
also of AF progression ?
![Page 30: Atrial fibrillation and stroke...No SCAF >6mins~6hrs >6hrs~24hrs >24hrs No. at Risk No SCAF >6mins~6hrs >6hrs~24hrs >24hrs 2455 1926 1708 1528 1251 900 624 390 0 226 302 347 322 281](https://reader030.vdocument.in/reader030/viewer/2022013100/6090da9d7bfe832af83eaa78/html5/thumbnails/30.jpg)
Red ILR alert
Yellow ILR alert
- Asystole/ pause > 4.5 sec- Sustained bradycardia < 30/min- Sustained tachycardia > 182/min- Sustained VT>182 bpm- Any torsade des pointes (TdP) A
dm
issio
nD
iag
no
sti
c w
ork
-up - Pacemaker ajustments as needed
- Adjust AAD: control AF(L)- Adjust AAD, electrolytes: prevent TdP - Adjust rate control / heart failure drugs- Consider acute catheter ablation / ECV - ACS therapy / PCI as needed
- Successive AF(L) or AT- AF progression- Sinus arrests, sympt. bradycardia- Progressive sinus tachycardia *
*) COMPASS current heart rate being > 1 week more than 25% or > 20 bpm higher than initial or set point heart rate; may indicate heart failure
COMPASS guided diagnosis- Decreased HRV and/or activity support heart failure, uncontrolled hypertension, or points to impact of AF w/o
tachycardia if any episodes- Increased HRV supports SSS
Yellow alert or symptomatic patient- Should be dealt with within 1 week
Red alert - should be dealt with within one working day, subject to care by in-house 24/7 care service
Patient reports
with Symptoms
- Cardioversion if persistent AF- Consider catheter ablation - Pacemaker as needed- Adjust AAD: control AF(L)/ prevent TdP - Adjust rate control / heart failure drugs- Antithrombotics / PLAAO as needed- ACS therapy / PCI as needed- Blood pressure management
CO
MP
AS
SH
RV
an
d A
cti
vit
y
Ad
mis
sio
nD
iag
no
sti
c w
ork
-up
CO
MP
AS
SH
RV
an
d A
cti
vit
y
ILR diagnostics Diagnoses / treatments
>20 beats
>20 beats
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1 month – 53 patients
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35 year old male
Symptomatic atrial fibrillation
Obesity, BMI 31, no other risk factors
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Remote monitoring of patients with implantable cardiac devices has
benefits both for patients and physicians
Earlier detection of clinically relevant events not limited to SCAF
Probable a reduction of health care costs and consumption
However, an issue is how to handle all those data efficiently
The FOCUSONTM monitoring and triaging center may help to manage an
adequate handling of all transmitted ECG data
And it may potentially help to improve cardiovascular outcome
Conclusions
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atrialfibrillationresearch.nl
Thank you for your attention
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AF is progressive disease
AF is the most frequent arrhythmia: > 1 million will have AF by 2040
AF is not benign being associated with MACCE
AF is a growing health care problem
Atrial Fibrillation is a progressive disease
… often progresses from self-terminating to non-selfterminating AF
n FU, years AF progression
Euro Heart Survey AF, 2010 1219 1 15%
Record-AF, 2012 2137 1 15%