About ECGsource
**Excellent resource for ECG Criteria and Board Review!** ECGsource (from the developers of the CathSource and EchoSource Apps) is a supplemental application to ECGsource.com, the largest online educational resource for...
Previous Versions
Here you can find the changelog of ECGsource since it was posted on our website on 2016-09-30 19:58:16.
The latest version is 3.4 and it was updated on 2026-06-21 21:04:05. See below the changes in each version.
ECGsource version 3.4
Updated At: 2026-05-27
Changes: Version History This update from Apple will improve the functionality of this app. No new features are included.
- iOS 9 compatibility
- Implemented Autolayout to address screen size and rotation issues throughout the app
- Fixed a bug where video files would not play audio
- Card table view style
- Conversion to latest Swift 3.4 02/20/2018 Updated compatibility for iOS 7.1+ 3.3 10/17/2014 Minor bug fixes 3.2 06/12/2013 Added ECG Video Tutorial section, which includes over 50 minutes of video tutorials designed to assist beginners learning electrocardiogram interpretation. Tutorial topics include Understanding the Cardiac Conduction System, Understanding the Limb and Precordial Leads, Determining ECG Rate and Axis, Left Ventricular Hypertrophy, Bundle Branch Blocks, and ST-Segment Elevation. 3.1 02/06/2013 Added electrocardiograms for hypercalcemia, pulmonary embolism, and apical hypertrophic cardiomyopathy
Visual enhancements for both portrait and landscape views 2.3 03/01/2011 Improved support for both landscape and portrait viewing
Higher resolution for all ECG images
Added more ECG Criteria and images, including Brugada Syndrome and Ebstein's Anomaly
Minor visual enhancements for table views 2.2 09/30/2010 iPad Support
Now provides promotional code for online service 2.1 09/07/2010 -> Added ECG Quiz with scoresheet similar to that used for the ECG section of the American Board of Internal Medicine (ABIM) Cardiovascular Disease Exam.
-> Fixed display issue regarding the edges of ECGs on full-zoom.
-> Fixed certain instances where search bar would become invisible following a search. 2.0 08/03/2010 Improved resolution for iPhone 4
Minimal text updates for ECG Criteria 1.1 07/01/2010 1.0 06/19/2010
ECGsource version 3.4
Updated At: 2018-02-20
Changes: Feb 20, 2018
Version 3.4
This app has been updated by Apple to display the Apple Watch app icon.
- iOS 9 compatibility
- Implemented Autolayout to address screen size and rotation issues throughout the app
- Fixed a bug where video files would not play audio
- Card table view style
- Conversion to latest Swift
ECGsource version 3.4
Updated At: 2018-02-20
Changes: This app has been updated by Apple to display the Apple Watch app icon.
- iOS 9 compatibility
- Implemented Autolayout to address screen size and rotation issues throughout the app
- Fixed a bug where video files would not play audio
- Card table view style
- Conversion to latest Swift
ECGsource version 3.3
Updated At: 2010-06-19
Disclaimer
Official App Store Link
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