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Current Management of Syncope: Treatment Alternatives
Carlos A. Morillo1, Adrián Baranchuk
1Arrhythmia Service-Cardiology Division, McMaster University, HGH-McMaster Clinic 5th Floor, 237 Barton Street East, Hamilton, Ontario L8L 2X2, Canada. morillc@mcmaster.ca
Current Treatment Options in Cardiovascular Medicine
|August 25, 2004
Summary
Syncope, a common cause of physician visits, requires a focused diagnostic workup. Prognosis depends on heart disease presence, especially cardiomyopathy with reduced left ventricular function, guiding treatment strategies.
Area of Science:
- Cardiology
- Neurology
Background:
- Syncope is a frequent reason for medical consultation, characterized by transient loss of consciousness.
- Its diagnostic workup can be complex, necessitating a condition-focused approach for effective management.
Purpose of the Study:
- To outline a simplified diagnostic strategy for syncope.
- To emphasize the prognostic significance of structural heart disease, particularly cardiomyopathy and left ventricular dysfunction.
- To guide therapeutic interventions based on the underlying cause of syncope.
Main Methods:
- Diagnostic workup tailored to the presence or absence of structural heart disease.
- Evaluation for neurally mediated causes including tilt table testing, carotid sinus massage, and adenosine challenge.
- Assessment for infrequent causes like channelopathies in specific patient groups.
Main Results:
- Prognosis is significantly influenced by cardiomyopathy and left ventricular ejection fraction (<35%).
- Neurally mediated syncope management involves restoring orthostatic tolerance through increased fluid intake and countermaneuvers.
- Implantable cardioverter-defibrillators (ICDs) are often recommended for syncope with reduced LV function.
Conclusions:
- Syncope management requires a stratified approach based on cardiac status and suspected etiology.
- Reduced LV function in syncope patients indicates a potentially life-threatening condition requiring specific interventions.
- Therapy for syncope, especially in the elderly, must address multifactorial causes including medication review and bradycardic assessments.