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Stroke Prevention in Atrial Fibrillation

Stroke Prevention in Atrial Fibrillation

Greg Flaker

(2018)

Additional Information

Book Details

Abstract

Get a quick, expert overview of stroke risks among patients with treated and untreated atrial fibrillation, in addition to best practices for management and treatment of patients with atrial fibrillation to minimize stroke risks. This concise, clinically-focused resource by Dr. Greg Flaker consolidates today’s available information on this timely topic into one convenient resource, making it an ideal, easy-to-digest reference for practicing and trainee cardiologists as well as general practitioners treating and monitoring these patients.

  • Covers a broad spectrum of management and treatment options for atrial fibrillation including anticoagulants, surgical and implanted devices.
  • Presents information on recent drug trials to keep you up to date with the latest developments.
  • Includes guidance on anticoagulation in special situations, such as cardioversion and ablation, in addition to atrial fibrillation treatment in patients with other medical conditions including cancer, major bleeding disorders, and renal or liver disease.
  • Chapter on Risk Stratification assists in identifying patients with a high risk of stroke and predicting treatment outcomes.
  • Chapter on The New Anticoagulation Clinic overviews best practices for patient education, compliance, follow-up monitoring, and quality assurance to aid in better patient outcomes.

Table of Contents

Section Title Page Action Price
Front Cover Cover
Stroke Prevention in Atrial Fibrillation i
Stroke Prevention in Atrial Fibrillation iii
Copyright iv
List of Contributors v
Foreword vii
Contents ix
1 - An Economic Analysis of Stroke and Atrial Fibrillation 1
INTRODUCTION 1
DIRECT COST OF STROKE 2
INDIRECT COST OF STROKE 3
INTANGIBLE COSTS 3
IMPACT OF ATRIAL FIBRILLATION ON STROKE-RELATED COSTS 4
COST-EFFECTIVENESS OF TREATMENTS FOR STROKE PREVENTION IN ATRIAL FIBRILLATION 4
ECONOMIC ANALYSIS OF ANTICOAGULATION FOR STROKE PREVENTION 5
LIMITATIONS OF COST ANALYSIS STUDIES 5
COST-EFFECTIVENESS OF THE NEW ANTICOAGULANTS 6
CONCLUSION 7
REFERENCES 7
2 - Pharmacology of Oral Anticoagulants 11
VITAMIN K ANTAGONISTS 11
Pharmacology 11
Pharmacokinetics and pharmacodynamics 11
Drug interactions 14
DIRECT THROMBIN INHIBITORS 20
Pharmacokinetics 21
Drug interactions 22
DIRECT FACTOR XA INHIBITORS 23
General Pharmacology 23
Pharmacokinetics 25
Dosing 25
Drug interactions 26
Pharmacokinetics 27
Dosing 27
Drug interactions 27
Pharmacokinetics 28
Dosing 28
Drug interactions 29
DISCLOSURE STATEMENT 29
REFERENCES 29
3 - Anticoagulation Drug Trials for Stroke Prevention in Atrial Fibrillation 35
INTRODUCTION 35
ASPIRIN AND OTHER ANTIPLATELET AGENTS 35
VITAMIN K ANTAGONISTS 37
NON–VITAMIN K ANTAGONIST ORAL ANTICOAGULANTS TRIALS 38
RHEUMATIC ATRIAL FIBRILLATION 44
UNANSWERED QUESTIONS AND FUTURE TRIALS 44
REFERENCES 44
4 - Risk Stratification in Atrial Fibrillation 47
INTRODUCTION 47
CHADS2 47
CHA2DS2VASC 48
R2CHADS2 SCORE 48
QSTROKE SCORE 49
ATRIA STROKE SCORE 49
DO BIOMARKERS IMPROVE RISK ASSESSMENT FOR ATRIAL FIBRILLATION–RELATED STROKE? 49
THE ABC-STROKE SCORE 50
ASSESSMENT OF BLEEDING RISK IN PATIENTS WITH ATRIAL FIBRILLATION 51
HAS-BLED 52
HEMORR2HAGES 53
ORBIT 53
ABC BLEEDING SCORE 54
CENTRAL NERVOUS SYSTEM IMAGING TO REFINE STROKE AND BLEEDING RISK ASSESSMENT 54
DOES EVERYONE WITH ATRIAL FIBRILLATION NEED STROKE RISK ASSESSMENT? 56
THE ELDERLY 56
PAROXYSMAL ATRIAL FIBRILLATION AND STROKE RISK 57
FUTURE DIRECTIONS TO IMPROVE RISK SCORES 60
Ethnicity 60
CONCLUSION 61
REFERENCES 61
5 - Subclinical Atrial Fibrillation: Definition, Prevalence, and Treatment Strategies 67
INTRODUCTION 67
DEFINING SUBCLINICAL ATRIAL FIBRILLATION 67
PREVALENCE OF SUBCLINICAL ATRIAL FIBRILLATION 68
SUBCLINICAL ATRIAL FIBRILLATION AND STROKE RISK 69
THE PATHOGENESIS OF SUBCLINICAL ATRIAL FIBRILLATION STROKE RISK 73
STROKE RISK STRATIFICATION IN PATIENTS WITH SUBCLINICAL ATRIAL FIBRILLATION 75
TREATMENT OF SUBCLINICAL ATRIAL FIBRILLATION 75
CONCLUSIONS 76
REFERENCES 76
6 - The New Anticoagulation Clinic 79
INTRODUCTION 79
FUNCTION OF ANTICOAGULATION CLINICS 79
ROLE OF THE ANTICOAGULATION CLINICIAN 81
QUALITY OF CARE 81
EVOLVING ROLE OF THE ANTICOAGULATION CLINIC 82
EXPANDING THE ROLE OF THE ANTICOAGULATION CLINIC 84
PERIPROCEDURAL PLANNING 84
TOTAL WELLNESS OPTIONS 85
COMPLEX MEDICATION MANAGEMENT 86
POPULATION HEALTH 87
DISEASE STATE CLINICS: PULMONARY EMBOLISM MANAGEMENT 87
CONCLUSION 88
REFERENCES 88
7 - Management of Bleeding Associated With Anticoagulation 91
BACKGROUND 91
INCIDENCE MAJOR BLEEDING 91
Apixaban 91
Rivaroxaban 91
Edoxaban 93
Dabigatran 93
PATHWAY FOR MANAGING THE BLEEDING PATIENT 94
Step 1: Bleeding Definitions and Initial Assessment 94
Step 2: Fluid Resuscitation 94
Step 3: Laboratory Testing 95
Step 4: Managing Vitamin K Antagonist or Direct Oral Anticoagulant Major Bleeding (Table 7.3) 95
Vitamin K antagonist (warfarin) 95
Factor Xa inhibitors (rivaroxaban, apixaban, edoxaban) 97
Andexanet alfa (andexanet): reversal agent factor Xa inhibitors 97
Management factor IIa inhibitors (dabigatran) 97
Idarucizumab (praxabind): reversal agent factor IIa inhibitor 98
Step 5: Restarting Anticoagulation Following Major Bleeding 98
Gastrointestinal bleeding 98
Intracranial hemorrhage 99
Restarting anticoagulation after a surgery/procedure. If anticoagulation was discontinued and rescued or reversed for an urgent ... 99
CONCLUSION (FIG. 7.1) 100
REFERENCES 100
8 - Periprocedural Management of Anticoagulation in Patients With Atrial Fibrillation 105
BACKGROUND 105
GENERAL PRINCIPLES FOR PERIPROCEDURAL MANAGEMENT OF ANTICOAGULATION 105
IDENTIFICATION OF THE PATIENT AT HIGH RISK FOR A THROMBOEMBOLIC EVENT DURING ANTICOAGULATION INTERRUPTION 105
IDENTIFICATION OF THE PATIENT AT LOW RISK FOR THROMBOEMBOLIC EVENT DURING ANTICOAGULATION INTERRUPTION 106
Periprocedural Bleeding Risk 108
IDENTIFICATION OF SURGICAL PROCEDURES AT LOW RISK FOR BLEEDING 111
ANTICOAGULATION INTERRUPTION BEFORE SURGERY 111
Vitamin K Antagonists 111
Direct Oral Anticoagulants 112
Need for parenteral bridging anticoagulation 113
Direct Oral Anticoagulants 113
Warfarin 115
Bridging anticoagulation recommendations 115
Reinitiation of bridging anticoagulation postprocedure 115
Reinitiation of Direct Oral Anticoagulant postprocedure 116
Reinitiation of warfarin postprocedure 116
SUMMARY 117
REFERENCES 118
9 - Special Situations: Anticoagulation for Cardioversion 121
ANTICOAGULATION BEFORE CARDIOVERSION 121
The Role of Transesophageal Echocardiogram 122
Direct Oral Anticoagulation 123
ANTICOAGULATION AFTER CARDIOVERSION 124
SUMMARY 125
REFERENCES 125
10 - Anticoagulation for Ablation Procedures 129
REFERENCES 131
11 - Surgical and Implanted Devices for the Left Atrial Appendage 133
PHYSIOLOGY OF COAGULATION IN ATRIAL FIBRILLATION 133
IMPORTANCE OF LEFT ATRIAL APPENDAGE IN ATRIAL FIBRILLATION–ASSOCIATED THROMBOEMBOLISM 133
SURGICAL TECHNIQUES FOR LEFT ATRIAL APPENDAGE EXCLUSION 135
LARIAT DEVICE 137
LEFT ATRIAL APPENDAGE OCCLUSION DEVICES 138
WATCHMAN DEVICE 138
PATIENT SELECTION AND APPROVAL 140
AMPLATZER DEVICE 140
WAVECREST DEVICE 143
PERIPROCEDURAL AND LONG-TERM ANTICOAGULATION 143
COSTEFFECTIVENESS OF LEFT ATRIAL APPENDAGE OCCLUDER DEVICES 144
CONCLUSION 144
REFERENCES 145
12 - Patients Taking Oral Anticoagulants for Atrial Fibrillation With Concomitant Complex Disease States 149
MANAGEMENT OF ANTICOAGULANTS IN ASSOCIATION WITH ANTIPLATELET THERAPY 149
Case 149
PATIENTS WITH A PRIOR CEREBROVASCULAR ACCIDENT OR INTRACRANIAL HEMORRHAGE 152
Case: Ischemic Stroke 152
Stroke While on Anticoagulation 152
Cryptogenic Stroke 153
Case: Intracranial Hemorrhage 153
PATIENTS WITH ATRIAL FIBRILLATION AND UNDERLYING CANCER DIAGNOSIS: IMPLICATIONS FOR ANTITHROMBOTIC THERAPY 154
Case 154
SPECIAL PATIENT POPULATIONS AND PATIENTS WHO ARE EXCLUDED FROM CLINICAL TRIALS THAT PRESENT CHALLENGES IN ANTICOAGULATION FOR AT... 155
Case 155
Renal Function 156
Hepatic Dysfunction 156
Variations in Body Weight 156
Drug Interactions 157
REFERENCES 158
13 - Stroke and Atrial Fibrillation: The Neurologist’s Perspective 161
INTRODUCTION 161
EPIDEMIOLOGY 161
PATHOPHYSIOLOGY 162
CLINICAL PRESENTATION 162
DIAGNOSIS 162
ACUTE TREATMENT OF ATRIAL FIBRILLATION–ASSOCIATED STROKE 166
STROKE OUTCOMES IN ATRIAL FIBRILLATION 167
SECONDARY STROKE PREVENTION IN ATRIAL FIBRILLATION: ANTICOAGULATION FOR ALL? YES! 167
ATRIAL FIBRILLATION AND STROKE: MAJOR PROGRESS IN STROKE PREVENTION 168
REFERENCES 168
14 - Stroke and Atrial Fibrillation in Chronic Kidney Disease and Dialysis 171
Introduction 171
Ischemic Stroke in Chronic Kidney Disease and Dialysis 171
Epidemiology 171
Etiology 172
Outcomes After Stroke 173
Atrial Fibrillation in Chronic Kidney Disease and Dialysis 173
Epidemiology 173
Risk of Stroke Associated With Atrial Fibrillation 174
Risk of Bleeding in Chronic Kidney Disease 175
Therapies to Prevent Strokes in Patients With Chronic Kidney Disease and Atrial Fibrillation 175
Studies suggesting harm 177
Lack of consensus on use of anticoagulation for stroke prevention.Uncertainty of the benefits and risks of therapies to reduce t... 178
Direct Oral Anticoagulants in Chronic Kidney Disease or Dialysis 179
Left Atrial Occlusion Devices 179
Patients’ Values and Preferences 179
Future Directions 179
Conclusions 180
REFERENCES 180
Index 185
A 185
B 186
C 186
D 187
E 187
F 188
G 188
H 188
I 188
J 189
K 189
L 189
M 189
N 189
O 189
P 190
Q 190
R 190
S 190
T 191
V 191
W 192
X 192