Tag Archives: r wave progression

Comparing 12-Leads: Discussion

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This is the discussion for Comparing 12-Leads: Common Error or Common Disease? All of our readers were on the right track, and many were spot on! Sometimes, troubleshooting an ECG is more than just lead placement. In this case report, we had three 12-Lead ECG's, all featuring a similar pattern: inappropriate R-wave progression. Initially, when […]

Precordial Leads – The Transition, R-Wave Progression, R/S Ratio in Lead V1

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Since we covered the first 6 leads of the 12 lead ECG in the 6-part tutorial on axis determination, a few words about the precordial leads might be in order. These are leads V1-V6, the unipolar leads that are placed directly on the patient’s chest. The heart is a 3 dimensional object, and calculating the […]

EMS 12-Lead

Cardiac Rhythm Analysis, 12-Lead ECG Interpretation, Resuscitation

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Comments
Vince DiGiulio
The 360 Degree Heart – Part II
It is standard practice in electrocardiography to label the first 90 degrees counter-clockwise from "zero" that way. When you see a patient with "left axis deviation" you'll see that their measured QRS axis is somewhere between -30 and -90 degrees. Imagine if you saw someone with a mean QRS axis at 5 degrees. Now imagine…
2014-10-21 14:00:37
Bryan
The 360 Degree Heart – Part II
I don't understand why (-)III and aVL are be labeled -60 and -30 degrees instead of 300 and 330 degrees?
2014-10-21 13:43:29
The 360 Degree Heart – Part II | EMS 12 Lead
The 360 Degree Heart – Part I
[…] first post in our “360 Degree Heart” series attempted to visualize how the different frontal plane […]
2014-10-21 12:50:56
Eric Strong
Axis Determination – Part VI
This is a great discussion of axis determination. One minor suggestion: I think it's potentially misleading to refer to an axis between 0 and -30 as "physiologic left axis deviation", since "axis devitation" implies deviation from normal, and axes between 0 and -30 are perfectly normal, (depending on age and body habitus). It may be…
2014-10-05 17:09:00
Ian
Right ventricular infarction – Part I
Can you give me a little more info on hypervagotonia? I googled around for some info but there doesn't seem to be much info and it's a term I've never heard before. Thanks!
2014-10-05 15:09:24

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