Detection of Occult Paroxysmal Atrial Fibrillation After Stroke Using Prolonged Ambulatory Cardiac Monitoring

Mayo Clinic

Status: Completed

Conditions: Atrial Fibrillation; Stroke

Treatments: Other: Mobile cardiac rhythm monitoring

Study type: Observational

Funder types: Other; Industry

Identifiers

NCT01325545

08-003788

Details and patient eligibility

About

About one-third of patients with stroke have no documented cause for the cerebrovascular event (known as cryptogenic strokes). Atrial fibrillation is a common cause of stroke, but when transient (paroxysmal) it may remain undiagnosed. Recent data suggest that occult paroxysmal atrial fibrillation may be identified in patients with cryptogenic strokes using prolonged ambulatory cardiac rhythm monitors.

The investigators designed this study pursuing the following goals:

1. To determine the prevalence of occult paroxysmal atrial fibrillation in patients with cryptogenic stroke using long-term mobile cardiac outpatient telemetry.
2. To compare this prevalence to that found in a control group with stroke of known, non-cardioembolic cause.
3. To look for clinical, laboratory, echocardiographic, and imaging data that serve as risk factors for occult paroxysmal atrial fibrillation in patients with cryptogenic stroke.
4. To examine the utility of mobile cardiac outpatient telemetry, a relatively new diagnostic tool, in the evaluation of patients with cryptogenic stroke.

Enrollment: 132 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Stroke or TIA within previous 3 months
• Stroke work up including: EKG, serum lipids, serum TSH, TTE or TEE, brain CT and/or MRI, Vascular Evaluation of head and neck using any combination of ultrasound, MRA, CTA, and conventional angiography

Exclusion criteria

• Documented history of atrial fibrillation or flutter
• PFO closure planned before conclusion of the monitoring period
• Incomplete stroke work up

Trial design

132 participants in 2 patient groups

Cryptogenic stroke

Description:

Patients with stroke of unknown cause after comprehensive conventional evaluation

Treatment:

Other: Mobile cardiac rhythm monitoring

Stroke of known cause

Description:

Patients with stroke of known cause determined by comprehensive conventional evaluation

Treatment:

Other: Mobile cardiac rhythm monitoring