khalid almuti, m.d., fhrs, facc/media/non-clinical/files-pdfs-excel... · 2017. 11. 7. · khalid...
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Khalid Almuti, M.D., FHRS, FACC
Current Detection & Diagnosis of
Atrial Fibrillation
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Disclosure Slide
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• No relevant disclosures related to this presentation
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Learning Objectives
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Upon completion of this activity, participants should be able to …
• Identify the drastic changes in AF diagnostic and treatment options over past two decades
• Identify the current diagnostic tools for detection and follow-up of atrial fibrillation
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Chugh S. et al, Circulation, February 2014
Prevalence of AF Worldwide
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Lloyd-Jones D. et al, Circulation, August 2004
Estimated Lifetime Risk of AF to Age 95
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Symptomatic/diagnosed AF
Asymptomatic/undiagnosed AF
Tip of The Iceberg
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Cryptogenic Stroke
o About 15% of strokes are attributed to documented AF, 50-60% to documented cerebrovascular disease
o The etiology of approximately 25-30% of ischemic strokes/TIA cases remains undetermined (undiagnosed AF is suspected of being a major contributor to this undetermined etiology).
o Due to the nature of AF, traditional monitoring methods with 12-lead ECG’s and 24-72 Holter monitors frequently fail to document the presence of the arrhythmia.
o There are no standard recommended methods to document AF in such scenarios.
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Diagnosis of AF - Classic Story
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New Technology
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Halcox J, Circulation; August 2017
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Implantable devices as diagnostic tools
o Implantable devices such as pacemakers, ICD’s and implantable event recorders have provided us with a valuable tool to document AF that would have otherwise not been realized and to describe the relationship between such AF episodes/burden and stroke/TIA events.
o Such devices have very high accuracy level exceeding 95%
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Implantable Cardiac Devices
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Clinical Benefits of New Technology + Remote Monitoring
o Automatic early notification of changes in patient’s clinical condition
o Such notifications allow for early clinical intervention
Atrial fibrillation management
Initiation of timely stroke prophylaxis
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Case : Atrial Fibrillation
40 year old man with paroxysmal atrial fibrillation
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Case : Atrial Fibrillation
Ablation
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Case 1: Atrial Fibrillation
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Am J Cardiol 2015;116:889441 patients
Crystal AF Study
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Crystal AF Findings
• ICM is superior to standard monitoring in detection of AF in patients with cryptogenic stroke
• AF was detected in 30% of patients at 36 months in the ICM arm
• 92% of patients with AF in the ICM arm had a day with greater than 6 minutes of AF
• Detection of AF changed anticoagulation management in 97% of patients
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Relationship between device detected AF and embolic events – ASSERT Trial
N Engl J Med. 2012:366;2
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ASSERT Trial
• SCAF were associated with an increased risk of ischemic stroke or systemic embolism (hazard ratio, 2.49).
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Conclusions
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• A great percentage of patients with atrial fibrillation remain undiagnosed
• Patient operated, patient-friendly newer diagnostic tools offer hope for increased detection and improved management/follow-up of atrial fibrillation
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Thank you!
Thank you!
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References
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Issa Z, Miller J, Zipes D. Clinical Arrhythmology and electrophsiology, 1st edition, 2009.
Huang S, Wood M. Catheter ablation of cardiac arrhythmias, 2nd edition, 2011.