Note the R/S ratio in V1 is quite high. Now, here is the same patient with a posterior ECG tracing. Leads V7 to V9 were added. Leads V1 and V2 were moved a bit just to confuse us. There is not ...

Knowing the basic parts of an ECG tracing will lay a good foundation for ... You can never look at too many 12-lead ECG tracings. In real life, you see full 12-lead ECG tracings — so that ...

As noted above, the precordial leads are unreliable ... Of course, such an approach requires more than a single ECG tracing. Incorporation of these ideas in one's "routine" is not cumbersome ...

Figure 18B shows the 12-lead ECG of the entrainment tracing of Figure 18A. The QRS morphology in all 12-lead ECGs during entrainment is identical to that of pacing in the absence of tachycardia as ...