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Optimal NOAC for Vulnerable
Population with AF
ChenHung Lee (李振宏)
History
• Early 1920s- Northern United States and Canada
• In 1921- Sweet clover
• In 1929- a lack of functioning Prothrombin
• In 1940- synthesize Dicoumarol
• In 1948- Warfarin, rodenticide
• In 1954- medical use; Dwight Eisenhower heart
attack
• In 1978- inhibits epoxide reductase- interferes with
vitamin K metabolism
An Avoidable Stroke Burden in Patients with AF
 National Health Insurance research database in Taiwan (1996 – 2011).
 AF patients without use of any anti-platelet or anti-coagulant agent during the
follow-up of 3.4 years.
12.7% Patients experienced
Ischemic Stroke
• AF patients: 186,570
• Ischemic stroke experienced patients: 23,723
Chao et al. J Am Coll Cardiol 2014;64:1658–65
High Mortality after Stroke in Patients with AF
 First-ever ischemic stroke included in a 5-year period (1994 –1998) in the
prospective, population-based registry and identified 3,530 patient with
ischemic stroke.
 Annual mortality rates were higher in patients with AF than in those without AF
at 1 year (49.5% versus 27.1%).
49.5% Annual
Mortality Rate
after Stroke in Patients with AF
Marini et al. Stroke. 2005;36:1115-1119
Worldwide Utilization of Oral Anticoagulation in AF:
Results from a Global Registry
Healey et al. ESC 2011
65.1
44.8
63.5
38.7
55.8
36.9 39.9
10.5
43.6
0
20
40
60
80
100
%
OAC in CHADS2 ≥2
53.5
43.5
66.9
59.1
46.8
39.5
33.9 36.1 38.4
0
20
40
60
80
100
%
TTR*
*Based on 3 most recent INR values
Based on 15,174 patients with AF between Jan 2008 and Apr 2011, appropriate use of
OAC remains low, when used, INR control is suboptimal.
6
Pivotal Warfarin-Controlled Trials
Stroke Prevention in AF
RE-LY (Dabigatran)
Open label
2 doses
Twice daily
ROCKET AF (Rivaroxaban)
Double blind
2 doses
Once daily
ARISTOTLE (Apixaban)
Double blind
2 doses
Twice daily
ENGAGE AF-TIMI 48 (Edoxaban)
Double blind
2 doses
Once daily
NOACs vs. Warfarin 71,683 Patients
2009 2010 2011 2012 2013 2014
Connolly SJ, et al. NEJM 2009; 361:1139-1151
Patel MR, et al. NEJM 2011; 365:883-891
Granger CB, et al. NEJM 2011;365:981-992
Giuliano RP, el al. NEJM. 2013;369:2093-2103
Prothrombin
Thrombin
Fibrinogen Fibrin
Coagulation Cascade
Intrinsic activation Extrinsic activation
X
Xa
Dabigatran
Rivaroxaban
Apixaban
Endoxaban
Novel oral anticoagulants (NOACs)
Relative risk for stroke in vulnerable
patients with AF
HR = 1.46
HR = 1.85
HR = 2.86
HR = 2.86
HR = 2.61
HR = 2.27
HR = 1.62
HR = 1.49
Circ J. 2012;76(10):2289-304. Epub 2012 Sep 19.
N Engl J Med. 2012 Aug 16;367(7):625-35.
Vulnerable
Population
with AF
Coronary
Artery
Disease
Aging
population
Stroke
Heart
Failure
HTN
Chronic
Renal
Failure
Diabetes
mellitus
Transient
ischaemic
attack
Novel oral anticoagulants (NOACs)
• 限用於非瓣膜性心房纖維顫動病 患,且須符合
下列條件之一: (1)曾發生中風或全身性栓塞。
(2)左心室射出分率小於40%。 (3)有症狀之心臟
衰竭:收案前依紐 約心臟協會衰竭功能分級為
第二 級或以上。 (4)年齡75歲(含)以上。 (5)年齡
介於65歲至74歲且合併有糖 尿病、高血壓或冠
狀動脈疾病。
Age is a key risk factor in CHA2DS2-
VASc and HAS-BLED score
Risk Factor in CHA2DS2-VASc Score
Congestive heart failure 1
Hypertension 1
Age ≧ 75 y 2
Diabetes mellitus 1
Previous Stroke / TIA 2
Vascular disease (prior MI,
PAD, or aortic plaque)
1
Age 65–74 y 1
Sex category (i.e., female sex) 1
Maximum score 9
Risk Factor in HAS-BLED Score
Hypertension 1
Abnormal renal and liver
function (1scoreeach)
1 or 2
Stroke 1
Bleeding tendency or
predisposition
1
Labile INRs 1
Elderly (>65 y) 1
Drugs or alcohol (1 score
each)
1 or 2
Maximum score 9
C.-E. Chiang et al. / Journal of Arrhythmia 33 (2017) 345–367
Thank you.
2021 04 1

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2021 04 1

  • 1. Optimal NOAC for Vulnerable Population with AF ChenHung Lee (李振宏)
  • 2. History • Early 1920s- Northern United States and Canada • In 1921- Sweet clover • In 1929- a lack of functioning Prothrombin • In 1940- synthesize Dicoumarol • In 1948- Warfarin, rodenticide • In 1954- medical use; Dwight Eisenhower heart attack • In 1978- inhibits epoxide reductase- interferes with vitamin K metabolism
  • 3. An Avoidable Stroke Burden in Patients with AF  National Health Insurance research database in Taiwan (1996 – 2011).  AF patients without use of any anti-platelet or anti-coagulant agent during the follow-up of 3.4 years. 12.7% Patients experienced Ischemic Stroke • AF patients: 186,570 • Ischemic stroke experienced patients: 23,723 Chao et al. J Am Coll Cardiol 2014;64:1658–65
  • 4. High Mortality after Stroke in Patients with AF  First-ever ischemic stroke included in a 5-year period (1994 –1998) in the prospective, population-based registry and identified 3,530 patient with ischemic stroke.  Annual mortality rates were higher in patients with AF than in those without AF at 1 year (49.5% versus 27.1%). 49.5% Annual Mortality Rate after Stroke in Patients with AF Marini et al. Stroke. 2005;36:1115-1119
  • 5. Worldwide Utilization of Oral Anticoagulation in AF: Results from a Global Registry Healey et al. ESC 2011 65.1 44.8 63.5 38.7 55.8 36.9 39.9 10.5 43.6 0 20 40 60 80 100 % OAC in CHADS2 ≥2 53.5 43.5 66.9 59.1 46.8 39.5 33.9 36.1 38.4 0 20 40 60 80 100 % TTR* *Based on 3 most recent INR values Based on 15,174 patients with AF between Jan 2008 and Apr 2011, appropriate use of OAC remains low, when used, INR control is suboptimal.
  • 6. 6 Pivotal Warfarin-Controlled Trials Stroke Prevention in AF RE-LY (Dabigatran) Open label 2 doses Twice daily ROCKET AF (Rivaroxaban) Double blind 2 doses Once daily ARISTOTLE (Apixaban) Double blind 2 doses Twice daily ENGAGE AF-TIMI 48 (Edoxaban) Double blind 2 doses Once daily NOACs vs. Warfarin 71,683 Patients 2009 2010 2011 2012 2013 2014 Connolly SJ, et al. NEJM 2009; 361:1139-1151 Patel MR, et al. NEJM 2011; 365:883-891 Granger CB, et al. NEJM 2011;365:981-992 Giuliano RP, el al. NEJM. 2013;369:2093-2103
  • 7. Prothrombin Thrombin Fibrinogen Fibrin Coagulation Cascade Intrinsic activation Extrinsic activation X Xa Dabigatran Rivaroxaban Apixaban Endoxaban Novel oral anticoagulants (NOACs)
  • 8. Relative risk for stroke in vulnerable patients with AF HR = 1.46 HR = 1.85 HR = 2.86 HR = 2.86 HR = 2.61 HR = 2.27 HR = 1.62 HR = 1.49 Circ J. 2012;76(10):2289-304. Epub 2012 Sep 19. N Engl J Med. 2012 Aug 16;367(7):625-35. Vulnerable Population with AF Coronary Artery Disease Aging population Stroke Heart Failure HTN Chronic Renal Failure Diabetes mellitus Transient ischaemic attack
  • 9. Novel oral anticoagulants (NOACs) • 限用於非瓣膜性心房纖維顫動病 患,且須符合 下列條件之一: (1)曾發生中風或全身性栓塞。 (2)左心室射出分率小於40%。 (3)有症狀之心臟 衰竭:收案前依紐 約心臟協會衰竭功能分級為 第二 級或以上。 (4)年齡75歲(含)以上。 (5)年齡 介於65歲至74歲且合併有糖 尿病、高血壓或冠 狀動脈疾病。
  • 10. Age is a key risk factor in CHA2DS2- VASc and HAS-BLED score Risk Factor in CHA2DS2-VASc Score Congestive heart failure 1 Hypertension 1 Age ≧ 75 y 2 Diabetes mellitus 1 Previous Stroke / TIA 2 Vascular disease (prior MI, PAD, or aortic plaque) 1 Age 65–74 y 1 Sex category (i.e., female sex) 1 Maximum score 9 Risk Factor in HAS-BLED Score Hypertension 1 Abnormal renal and liver function (1scoreeach) 1 or 2 Stroke 1 Bleeding tendency or predisposition 1 Labile INRs 1 Elderly (>65 y) 1 Drugs or alcohol (1 score each) 1 or 2 Maximum score 9 C.-E. Chiang et al. / Journal of Arrhythmia 33 (2017) 345–367
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