EP Calipers provides electronic calipers to measure intervals on images of ECGs or electrophysiologic recordings. EP Calipers can be used to make accurate ECG measurements on your Mac and do calculations such as mean heart rate, corrected QT interval, or even measure the beta angle in Brugada syndrome using electronic calipers similar to those in electrophysiologic recording systems. Analyze ECG images as well as PDF files, such as ECGs generated by the Kardia™ AliveCor™ device. Analyze anything open on your desktop using the Transparent Window feature.