ECG Pocket brain expanded version for free download
ECG Pocket brain expanded version for free download The “good news” (as discussed on the next few pages) — is that use of the Algorithm in Figure 05.2-1 allows accurate diagnosis of the type of conduction defect (BBB or IVCD) in less than 5 seconds!
The reason we can accurately diagnose the type of conduction defect soquickly — is that:
ECG Pocket brain expanded version for free download i) There are only 3 possible answers (typical RBBB; typical LBBB; or IVCD); and ii) We only need to look at 3 leads to make the diagnosis. NOTE: With experience — You’ll look at all 12 leads for finer aspects of ECG interpretation. But only 3 leads are needed to diagnose the type of conduction defect.
The 3 KEY leads (and the only 3 leads needed) to determine the type of conduction defect (RBBB, LBBB, or IVCD) — are leads I, V1, and V6. NOTE: We key in on 2 left-sided leads (leads I,V6) — and 1 right-sided lead (lead V1) when using Figure 05.2-1 to diagnose the type of conduction defect:
ECG Pocket brain expanded version for free download Remember — Use of the algorithm in Fig. 05.2-1 implies that the rhythm is supraventricular (and not VT or WPW).
05.3 – FIGURE 05.3-1: Why the Need for the BBB Algorithm?
The reason you want to recognize conduction defects before you get too far in the interpretation process — is that criteria for axis, LVH, RVH, ischemia and infarction are all different when there is BBB or IVCD! Consider the example in Figure 05.3-1, obtained from a hemodynamically stable patient with a history of heart failure