Monday, February 29, 2016

ECG: Corrected QT

Hello again! Finally, we're back with our newest android-based application. What is it this time? Yap, still wandering around ECG thingy, now we proudly present the ECG: Corrected QT application. 

Around many aspects to interpret in ECG recording, QT interval is one of the most important. QT interval is the duration between the beginning of Q wave and the end of the T wave. Its duration in ECG recording represents the time taken for ventricular depolarization and repolarization. An abnormally prolonged QT interval is associated with an increased risk of ventricular arrhythmias, especially Torsades de Pointes. Meanwhile, the recently described congenital short QT syndrome has been found to be associated with an increased risk of paroxysmal atrial and ventricular fibrillation and sudden cardiac death.

On the other hand, QT interval is affected is affected by heart rates. The QT interval is inversely proportional to heart rate. It will shorten at faster heart rates and lengthens at slower heart rates. Then, how can we surely estimate if one QT interval is normal? It is recommended to interpret the normal values of QT interval based on the corrected QT (QTc), in order to avoid the effects of heart rate on QT values. By calculating the QTc, we can do a comparison of QT values over time at different heart rates and improves detection of patients at increased risk of arrhythmias. By simply click this link or the badge below, estimating the corrected QT interval would never be this easy!

Get it on Google Play

Why should you choose ECG: Corrected QT?
- It is simple and very easy to use.
- The calculation is precise and accurate.
- Based on 3 most commonly used formulas, Bazett, Fredericia, and Framingham.
- It is totally free!

The corrected QT interval (QTc) will estimate the QT interval at a heart rate of 60 beats per minute. In order to achieve the QTc value, you need to input the QT interval (in msec) and the heart rate (in beats per minute). QT interval should be measured in either lead II or V5-6. Several successive beats should be measured, with the maximum interval taken. After that, the application will automatically do the math for you, using 3 available formula, namely Bazett, Fredericia and Framingham formula. Bazett's formula is the most commonly used because of its adequate correction for heart rates ranging from 60 - 100 bpm. But it over-corrects at heart rates >100 bpm and under-corrects at heart rates <60 bpm. At heart rates outside of the 60 - 100 bpm range, the Frederica or Framingham corrections are more accurate and should be used instead. 

The interpretation of QTc value is as follows. QTc is prolonged if >440 ms in men or >460 ms in women while QTc is abnormally short if <350 ms. QTc >500 ms is associated with increased risk of Torsades de Pointes. Now, based on the QTc result, the physician can determine whether the patient has an increased risk of arrhythmia and planning further diagnostic step and therapy. Here is the preview of our apps on Google Nexus 4.

ECG: Corrected QT PreviewECG: Corrected QT Preview

We hope you found this brief review helpful. Don't forget to download the application and give a positive review on play store! Got something on your mind? Don't hesitate to contact us at 

See you real soon and have a nice day!

Design attribution:
Icons made by Plainicon from is licensed by CC 3.0 BY

Monday, February 15, 2016

ECG: Heart Axis

Hello, everyone! Back with us again, the imedical-apps team. Now we're going to give you sneak a peak about our new application ECG: Heart Axis

The idea of making this new application popped up when we're trying to interpret a series of ECG recording, and find it complicated to get the exact heart axis by calculating the vector manually. Heart axis or cardiac axis is the direction of action potentials during ventricular depolarizations. Knowing heart axis is important, as some abnormalities of the heart structure could make the heart deviates from its normal axis. 

Actually, we could get the gross heart axis just by determining the resultant deflection of the QRS complex in lead I and AVF. For example, if the QRS complex has a positive deflection in both lead I and AVF, we can conclude that the heart axis is normal (lies between 0 to 90 degree). But what if one of the QRS complex, either in lead I or AVF, has a negative deflection? Is that always counts for an abnormal heart axis? Think again. Normal heart axis lies between -30 degree to 120 degree. So if the negative deflection of QRS complex happened only in lead I, one still has the probability of having normal heart axis (as it still has a probability of having lies between 90 degree to 120 degree). 

Then, how could we differentiate that? Simply tap on this link or click the badge below.

Get it on Google Play

ECG: Heart Axis  is a simple application to determine heart axis from a simple ECG recording. It works by calculating the resultant vector from the QRS complex in lead I and AVF automatically. The electrical heart axis will then be shown in vector degrees. By simply putting the resultant QRS deflection (mm), the application will give you one of the four interpretation results, namely normal heart axis, left axis deviation (LAD), right axis deviation (RAD) and extreme axis deviation.

ECG Heart Axis

The resultant QRS deflection (mm) could be achieved by calculating the resultant amplitude of R wave and S wave (or Q wave if any). If the R wave comes in a positive deflection (e.g +5 mm) and the S wave comes in a negative deflection (e.g -2mm), then we get the resultant QRS deflection of 3 mm. Easy, right? Then you could just let the application do the math for you. 

ECG Heart Axis

Why should you choose ECG: Heart Axis?
- It is simple and very easy to use.
- The calculation is precise and accurate.
- The electrical heart axis is shown in vector degrees.
- Interpretation result is provided.
- It is totally free!

If you find this application helpful please give a positive review and rate us 5 stars! Please feel free to send us email about whatever comes in your mind about our applications or even suggesting us on what application we should work into next. Have a good day!

Design attribution:
Icons made by Plainicon from is licensed by CC 3.0 BY
Background on application banner Designed by Freepik

Sunday, February 14, 2016

Arterial Blood Gas Pro

Hello, all! 

For today's post prologue, we'd like to ask you something first. As a doctor or medical student, have you ever feel confuse interpreting a set of blood gas analysis report? If the answer is yes, here we'll provide you the easy way out! By clicking this link or the badge below, you can all have the solution in just one tap of a finger.

Get it on Google Play

Packed as a handy application, our recent app is called Arterial Blood Gas Pro (ABG Pro). It is an application designed to help medical professional to analyse and interpret the arterial blood gas report.

Why should you choose Arterial Blood Gas Pro?
  • It's simple and very easy to use
  • There are 3 main features, namely basic ABG, advanced ABG and normal value
  • The results are easy to understand
  • Handy and useful for medical professionals in clinical practice, intensive care or emergency unit
  • It is totally free!

Basic ABG feature was designed to help you in interpreting simple arterial blood gas report. Interpretation of the basic arterial blood gas report could be achieved by putting the pH, blood level of bicarbonate and partial pressure of carbon dioxide. By clicking the interpretation button, the result of the blood gas analysis will be shown.

Not satisfying enough? Kindly check our advance ABG feature. By adding the blood level of sodium, chloride and albumin in the equation, the application will also provide you the expected level of bicarbonate and partial pressure of carbon dioxide to be achieved in acute and chronic state. The application could also detect the inconsistent value put in the equation and showed you whether the validity of the interpretation could be affected. The application will determine whether it's an alkalosis or acidosis state, caused by respiratory or metabolic process, expected compensation, anion gap, and the presence of other mixed disorders. 

Want to manually check your ABG report? Here we also provide you the normal value of certain laboratory parameter, such as pH, partial pressure of carbon dioxide, blood level of bicarbonate, sodium, chloride and albumin, normal value of base excess and anion gap. By any feature you decide to use, we hope it offers you a great help always.

Well, that's a brief post regarding our application. Feel free to send anything on your mind about this application to our email, and if you dowloaded it already please send some review and give us 5 stars in google play store!

Design Attribution:
Background on application banner Designed by Freepik