Condition: Atrial Fibrillation (AF) · Atrial Fibrillation (Prevention of Stroke) · Sponsor: Oxford University Hospitals NHS Trust
Atrial Fibrillation (AF) is the most common sustained cardiac arrhythmia, affecting 1-2 million people in the UK. AF is characterised by uncoordinated electrical activation and ineffective contraction of the upper cardiac chambers. AF can occur in temporary episodes, as in paroxysmal AF, or can be sustained continuously beyond 7 days' duration, as in persistent AF. The most significant potential complication of AF is stroke caused by a blood clot (thromboembolic stroke). If untreated, the risk of stroke in AF can be increased as much as five-fold, depending on the presence of other risk factors. The mechanism of thromboembolic stroke in AF patients is complicated and understanding of factors involved remains incomplete. AF has been shown to disrupt normal bodily mechanisms for controlling bleeding and clotting (haemostasis) and normal blood flow inside the cardiac chambers. In disrupting these mechanisms, AF can be said to create a 'prothrombotic' state or environment within the blood and heart (a tendency to form clots) which can lead to blood clot formation and subsequently to stroke. There is research evidence that AF-related stroke risk is not fixed and changes over time. This dynamic risk may be related to the episodic nature of AF, with stroke risk changing during an episode of AF and for a period of weeks after the episode terminates. Analytic studies have shown that the risk of stroke is highest in the days after an AF episode has occurred, peaking at 5 days and r…
This description comes directly from the study's public registry record.
Dr Richard K. Varini MBChB MRCPI · +441865220255 · richard.varini@ouh.nhs.uk
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| Oxford University Hospitals NHS Trust, John Radcliffe Hospital | Oxford, Oxfordshire, United Kingdom | Recruiting |
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Source record: clinicaltrials.gov/study/NCT06922695