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I want to find the approximate effective path/line on the heart that ML II channel detects on the heart. The normal ECG angle is 59 angle. ML II channel, which is a combination of two bipolar leads, is in this picture marked by II

enter image description here

This lead seems to detect at the corner 135 degrees. I think we approximate here already because the term "ML II" seems to be used only in ambulatory ECG. I am not sure how good this approximation is that we consider II lead as ML II lead.

How can you approximate the electric line on the heart detected by ML II?

Each patient is individual so it is difficult for me to attach any points between there so start to make some short of interpolations.

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I am sorry, but I do not understand your question mostly due to your english being a little approximate. I think you are asking for the exact positioning of lead II for any particular patient, given the inter individual variability in heart position. Is that it? –  Raoul Oct 26 at 2:29
    
@Raoul Yes, you are right. I am interested in how much variability there can be caused by each patient. –  Masi Oct 26 at 5:55
    
Then I am sorry, but I do not think any of us can answer this question in a satisfying way. What I can say though, is that the inter individual variability is huge. –  Raoul Oct 26 at 13:08
    
@Raoul You are right. The lead measures potential between two points so this is already a big simplification. Compare, for instance, barrel chest person with skinny person. Therefore, I am interested in if there is done some manipulation in ECG data afterwards to fix this problem. –  Masi Oct 26 at 16:15
    
No, I don't think there is anything you could do afterwards. You could correct the signal by imaging the heart at the time of measure. But if you are imaging the heart, then the EKG becomes mostly irrelevant. –  Raoul Oct 26 at 17:05

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