EP QTc
Ultimate QTc/QTp calculator
EP QTc is an iOS and macOS app that simultaneously calculates QTc (corrected QT) and QTp (predicted QT) intervals using many different published formulas. Detailed information on each formula is given and the results can be graphed and imported into text editors or spreadsheets. The app uses the QTc framework. For more background see Hacking the QTc.
License
This app is open source, and licensed under the Apache License, Version 2.0. When used with Apple devices via the iTunes App Store, it is subject to the standard Apple iOS license agreement.
Copyright
Copyright © 2017-2021 EP Studios, Inc.
Acknowledgments
Thanks to Marian Stiehler for help in acquiring the original literature that forms the basis of these QTc and QTp formulas.
Thanks to Dr. Simon Rabkin at the University of British Columbia for corresponding with me regarding the QT interval, and for his and his team's fine work on the nomenclature and categorization of the numerous QT formulas which formed a basis and inspiration for this app. I also thank the multitude of investigators who over the years have attacked the problematic QT interval, using math in an attempt to flatten nature's heart rate versus repolarization curve.
This app uses SigmaSwiftStatistics for statistical analysis of the QT formulas. This framework is copyright (c) 2015 Evgenii Neumerzhitckii and is licensed under the MIT License.
The app also uses the Charts framework for graphing. This framework is copyright 2016 Daniel Cohen Gindi & Philipp Jahoda, and is licensed under the Apache License, Version 2.0.
The app uses Validator which has an unrestricted license.
Author
David Mann, MD
Email: mannd@epstudiossoftware.com
Website: https://www.epstudiossoftware.com