Doctors wanting to determine a patient’s atrial fibrillation burden have a myriad of technologies at their disposal: 24-hour Holter monitors, 30-day event monitors that are triggered by an abnormal heart rhythm or by the patient themselves, a 7-14 day patch monitor that records every heart beat and is later processed offlineto quanitate the arrhythmia, or perhaps an surgically-implanted event recorder that automatically stores extremes of heart rate or the surface ECG when symptoms are felt by the patient. The cost of these devices ranges from the hundreds to thousands of dollars to use.
Today in my clinic, a patient brought me her atrial fibrillation burden history on her iPhone and it cost her less than a $10 co-pay. For $1.99 US, she downloaded the iPhone app Cardiograph to her iPhone.
Every time she feels a symptom, she places her index finder over the camera on the phone, waits a bit, and records a make-believe rhythm strip representing each heart rhythm. With it, comes the date and time.