arrhythmia3.5 - App Store

Practice reading EKGs in lead II

Basic EKG interpretation is more accurately described as an intermediate level skill that takes time, practice and refreshing. Whether you are a doctor, nurse, EMT or tech your ability to read and pickup on basic EKG changes in real time is essential. Practice with an app that actually looks like what you see at work.

Use the app’s ‘Study Mode’ to choose one or multiple rhythms to view and compare. A brief description of each rhythm is provided, you can also pause and restart rhythms. Delete and add specific rhythms as desired. Rates, amplitudes and widths of the rhythms are dynamically set which provides for a more realistic simulation and variation within each type of rhythm.

Use the app’s ‘Game Mode’ to challenge yourself to identify rhythms presented randomly in lead II. If desired, you can also custom specify which rhythms to include in the game.

Access to Study Mode and Game Mode requires a subscription via in-app purchase.

Please Read: The purpose of this app is not to teach basic EKG interpretation but rather to practice basic EKG interpretation. If you don’t know basic EKG interpretation seek out additional resources such as classes, books, online materials and mentors to learn more and further your understanding.

Note: The cardiac rhythms presented by the app are simulated approximations. There is NO guarantee to the accuracy of rhythms presented. While accuracy is not guaranteed it is a goal. Please report errors, suggestions or general feedback to: feedback@arrhythmiaApp.com.

Arrhythmia uses the standard Apple Terms of Use End User License Agreement (EULA): http://www.apple.com/legal/itunes/appstore/dev/stdeula

Version History In Study Mode, added two new topics: “P, QRS and T” and “Coronary Arteries”.
Developed by an independent developer, thank you for your support! 3.5 09/08/2025 Improvements to the user interface.
‘Under-the-hood’ improvements to the app’s graphics efficiency.
Developed by an independent developer, thank you for your support! 3.4 08/27/2025 In Study Mode, added two new topics: "Calculating Rate" and "Visualizing Rate". More topics are coming in future updates. Thank you for your support! 3.3 04/20/2025 Developed by an independent developer, I thank you for your support! In Study Mode, added the new topic: “EKG Terminology”. Moved the ‘Rate this App’ button to the home page.

If you find the app helpful, please give it a rating and consider writing a review.
If you have frustrations, complaints or suggestions, please send me an email at: feedback@arrhythmiaApp.com

Updated the graphical design of the ‘About this app’ screen.

On the Mac version, improved responsiveness of buttons throughout the app by increasing the clickable target area of each button.

More topics are coming in future updates. 3.2 03/11/2025 In Study Mode, added two new topics: “Heart Anatomy” and “Heart Electrical Conduction System”.
More topics are coming in future updates.
Thank you for your support! 3.1 02/01/2025 This patch fixes a bug that in certain situations would cause the app to crash when returning to Study Mode. 3.0.1 01/16/2025 Now available on the Mac! Study Mode now has a new feature named Topics. The first two topics that have been added are “EKG Graph Paper” and “ST Elevation or Depression”. 

More topics are coming in future updates.

Quickstart video guides have been refreshed.

Created by an independent developer - thank you for your support. 3.0 12/22/2024 Created by an independent developer - thank you for your support! In Study Mode, added information panels for: SVT, Sinus Block, Junctional and Idioventricular.

Consider helping out by rating the app, leaving a review or simply sharing it with others. 2.7 10/05/2024 Thank you for your support! In Study Mode, added information panels for: Atrial Paced, Ventricular Paced, and Atrial and Ventricular Paced (Dual Chamber).

Graphical refinements to support dark mode.

Graphical additions to support dark and tinted app icons.

For Study Mode, improved the scrolling experience.

Fixed a bug that in some situations when returning to Study Mode the rhythms would stop animating.

More information panels are coming in future updates! 2.6 09/20/2024 Thank you for your support! In Study Mode, added information panels for: First-Degree Heart Block, Second-Degree Heart Block - Type I, Second-Degree Heart Block - Type II and Third-Degree Heart Block.

Also improved the rhythm appearance of Second-Degree Heart Block - Type II and Third-Degree Heart Block.

More information panels are coming in future updates! 2.5 09/01/2024 In Study Mode, added information panels for: PVC, ventricular tachycardia, ventricular fibrillation, ventricular fibrillation coarse, ventricular fibrillation fine and asystole.

Corrected a bug in Game Mode where the scoreboard was not visible.
 
More information panels are coming in future updates! 2.4 08/16/2024 In Study Mode, added information panels for: PAC, atrial fibrillation, atrial fibrillation with RVR, atrial fibrillation with rate control, atrial flutter, atrial flutter 2:1, atrial flutter 3:1, atrial flutter 4:1 and atrial flutter mixed conduction rhythms.

More information panels are coming in future updates! 2.3 07/18/2024 In Study Mode, added information panels for: normal sinus rhythm, sinus bradycardia, sinus tachycardia and sinus arrhythmia.

More information panels are coming in future updates! 2.2 07/09/2024 Improved the Game Mode answer selection experience by changing to a vertical scroll. This update is thanks to a user like you who offered their feedback. Have a comment, suggestion or idea? Send it in! 2.1 06/19/2024 Fixes an issue with subscription access to study mode and game mode. 2.0.1 06/04/2024 After years of being on hiatus, the app is all new!
Completely rebuilt from the ground up, with great new features:
• A separate Study Mode.  (You select the rhythms you want to study.)
• A separate Game Mode for challenging yourself.
(You select the rhythms you want to include in the game.)
• COLORS, a great set of colors to choose from!
• The graph lines (matrix) can now be turned off or on.
• Rhythm appearance and animations have been improved. 2.0 06/03/2024 Improved appearance of T waves.

Thank you for everyone's feedback and patience. If you enjoy using this app, please consider leaving a review. Your support makes an enormous difference! 1.2 03/23/2018 You can now select the specific rhythms to be displayed.

You can also select the number of EKG displays to be shown on the screen (one, two or three).

In addition there are some minor graphical enhancements. 1.1 09/24/2015 1.0 07/17/2015