Atrial Fibrillation/Sinus Rhythm Before and After Cardioversion

Inclusion Criteria:

• patients with atrial fibrillation and planned cardioversion
• male and female patients aged at least 18 years
• patients being able to understand and to follow the study staff´s instructions
• signed informed consent

Exclusion Criteria:

• persons being hosted in an institution by administrative order or court injunction
• pregnancy or breast feeding
• persons not being able to consent
• persons with implanted electronic devices
• material incompatiblity
• acute or chronic inflammation of the external or middle ear canal
• abnormal anatomic ear canal (congenital or pathological)
• persons in a dependent relationship to the investigator or employment contract