Prognostic markers derived from standard ECG have always been seductive. Increased dispersion of durations of the P wave. of the QRS complex. or of the QT interval has been associated with the risk of atrial fibrillation. https://www.roneverhart.com/HP-Notebook-15-da0008ca-HD-LED-15-6-Touchscreen-Intel-Core-i5-8250U-1-6-GHz-8-GB-RAM-1-TB-SSD-HDMI-USB-Multi-format-S/