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Cardiac Causes of Stroke
Insights
Cardioembolic strokes, often caused by cardiac conditions, require prompt management and primary prevention. Identifying high-risk cardiac sources is crucial for preventing recurrent cerebral embolism.
Area of Science:
- Cardiology
- Neurology
- Stroke Medicine
Background:
- At least 20% of ischemic strokes are cardioembolic, originating from cardiac sources.
- Cardiac causes of cerebral embolism are categorized as major or minor based on the strength of the established causal link to stroke.
Purpose of the Study:
- To review the primary cardiac conditions associated with cerebral embolism.
- To discuss the management strategies for stroke of cardiac source, including acute treatment and secondary prevention.
Main Methods:
- Literature review of established and potential cardiac causes of cerebral embolism.
- Analysis of stroke risk associated with various cardiac conditions.
- Overview of current management and prevention guidelines for cardioembolic stroke.
Main Results:
- Major cardiac causes include atrial fibrillation, myocardial infarction, valvular heart disease, endocarditis, and atrial myxoma.
- Potential causes like patent foramen ovale and mitral valve prolapse have uncertain or unknown risks for recurrent stroke.
- Management involves acute stroke treatment and prophylactic measures against recurrent thromboembolism.
Conclusions:
- Primary prevention is recommended for cardiac conditions with high stroke risk, such as atrial fibrillation or mechanical prosthetic heart valves.
- Effective management requires addressing both the acute stroke event and long-term prevention of further embolic events.
Abstract:
At least 20% of all ischemic strokes are cardioembolic. Cardiac conditions that cause cerebral embolism are classified as major or minor depending on whether the causal link has or has not been fully established between the underlying cardiac condition and the stroke. Atrial fibrillation, acute myocardial infarction, valvular heart disease, infective endocarditis, nonbacterial thrombotic endocarditis, and atrial myxoma are the main cardiac causes of cerebral embolism. Patent foramen ovale, atrial septal aneurysm, mitral valve prolapse, mitral annular calcification, calcific aortic stenosis, and mitral valve strands are cardiac conditions with a potential causal link to cerebral embolism, but until now, either they have been found to be poor predictors of recurrent stroke or their risk of recurrent stroke is unknown. The management of patients with a stroke of cardiac source is twofold: 1) treatment of the acute phase of stroke and 2) prophylactic treatment of recurrent thromboembolism. When possible, primary prevention of cerebral embolism should be recommended, particularly in cardiac conditions with known high risk of stroke (eg, atrial fibrillation, mitral stenosis, or presence of mechanical prosthetic heart valves).