Answer - Case of the month (May 2011): Difference between revisions
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'''Q: ECG of a 28 year old man with atypical chestpain. (Lead V3 is at V4R position). What is your diagnosis?''' | '''Q: ECG of a 28 year old man with atypical chestpain. (Lead V3 is at V4R position). What is your diagnosis?''' | ||
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[[File:E000536.jpg|200px|Figure 3]] | [[File:E000536.jpg|200px|Figure 3]] | ||
[[File:E000537.jpg|200px|Figure 4]] | [[File:E000537.jpg|200px|Figure 4]] | ||
[[File: | [[File:E000541.jpg|200px]] |
Revision as of 01:50, 17 May 2011
Q: ECG of a 28 year old man with atypical chestpain. (Lead V3 is at V4R position). What is your diagnosis?
A. Antero-lateral MI
B. Pericarditis
C. Hyperkalemia
D. Wrong lead positioning
Answer:
D. Wrong lead positioning
Explanation:
The extremity leads were positioned wrongly in this example resulting in enlarged QRS complexes and incorrect ST representation. The extremity leads were placed proximally on the chest (figure 1 lead_5). Correct lead positioning resulted in figure 2 (ECG_lead_3). The error could be reproduced, compare figures 3 and 4 (ECG_lead_1 and ECGlead_2).