1
$\begingroup$

I'm a newbie and I have a few questions regarding ECG signal. Here is my plot of raw ECG signal with a sampling frequency 200Hz in Matlab. whole ECG signal part of ECG signal

Does it look good to you? Why is it flipped?

$\endgroup$
  • 1
    $\begingroup$ Maybe somebody placed the sensors with the wrong polarity... $\endgroup$ – tashuhka Oct 14 '14 at 12:48
1
$\begingroup$

It's perfectly normal for the peaks to be at the bottom if that's what you're referring to. Even though on tv they are always on the top.

Here's an example from wikipedia. https://commons.wikimedia.org/wiki/File:Pulmonary_embolism_ECG.jpg

| improve this answer | |
$\endgroup$
1
$\begingroup$

The ECG is indeed inverted. You can tell from the inverted p- and t- waves, which is not uncommon, but for your entire ECG to be inverted, that is quite rare. Try changing the polarity of your two leads, or multiply your signal by -1.

| improve this answer | |
$\endgroup$
0
$\begingroup$

I don't think it is flipped. I think you should try to find out which of the ECG-leads you are looking at (I, II, V1, etc.)

| improve this answer | |
$\endgroup$
-1
$\begingroup$

It is not flipped. It is indicating a cardiac malfunction - deep Q wave...

| improve this answer | |
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.