Author + information
- Nicola Gaibazzi,
- Antonio Crocamo,
- Gianluca Gonzi and
- Claudio Reverberi
Background: The Heart Sentinel TM app (HS-app), preliminary presented at ACC2016 under the prior “Parachute-app” name, is conceived to detect cardiac arrest during outdoor sports, automatically alerting contacts via SMS with GPS position data. It automatically starts the chain of survival in case no bystander has witnessed the event, using commercially-available chest strap heart monitor and a smartphone. The heart rate analysis arm of the algorithm is extremely sensitive, with specificity being addressed by motion analysis through smartphone sensors, since only unexpected prolonged absence of motion would confirm true cardiac arrest and start an alert code.
We assessed the accuracy of such HS-app with simulated exercise-associated ventricular fibrillation (VF), and possible false positives in real-world athletes.
Methods: The occurrence of false positive alerts was tested in the outdoor field, through athletes regularly running and cycling, and with ECG simulators.
The occurrence of false negatives for VF detection was assessed with 3 different ECG simulators, using VF simulation protocols.
Results: Thirty athletes practiced outdoor sports for overall 829 hours. The false positive initiation of an alert countdown was recorded twice, both athletes being able to stop such false positive 15-second countdown before the alert SMS was actually dispatched. No false positive SMS was dispatched. False negatives were not recorded under any simulation protocol which comprised 140 overall simulations of VF using 3 different arrhythmia simulators. Time from VF start to SMS delivery to the pre-selected emergency number, which comprises the time needed for VF detection, the 15-second countdown and SMS delivery network-dependent time was=54±5 seconds.
Conclusions: A simple smartphone app, using commercially-available heart rate monitors, is promising to detect cardiac arrest caused by VF during sports, triggering automatic dispatch of emergency SMS with GPS position. During outdoor exercise, HS-app would be potentially helpful for cases of exercise-associated cardiac arrest in which no bystander is present to start an emergency rescue call.
Poster Hall, Hall C
Friday, March 17, 2017, 10:00 a.m.-10:45 a.m.
Session Title: Improving Outcomes in the Athlete With Cardiovascular Disease
Abstract Category: 7. Arrhythmias and Clinical EP: Sports and Exercise
Presentation Number: 1111-113
- 2017 American College of Cardiology Foundation