Evaluation of Heart Rate Variability by Smartphone App Using Pulse Photoplethysmography in Acute Myocardial Infarction
Highlights Smartphone-based PPG measurements of SDNN and rMSSD effectively differentiate AMI patients from healthy controls, with SDNN ≤21.35 ms showing high sensitivity (87.6%) for detection. Reduced HRV indices (SDNN and rMSSD) correlate with clinical severity markers, including lower LVEF, higher Killip class, and m...