course: EKG

11. Right Bundle Branch Block

In this material Self-study learning goals Electrocardiograms Define and identify the following: Normal QRS interval. Normal QRS direction. Define the two EKG criteria for RBBB. Recognize RBBB in the presence of: No other disease. Hemiblock. Myocardial infarction. Describe the expected ST changes in RBBB.   Clinically based critical interpretation Define the pathophysiology of RBBB. Describe […]

Hemiblock Worksheets

Intro paragraph? These worksheets are for self-study only. Answers will not be evaluated. Instructions and examples Instructions for Chapter 10 worksheets: Complete basic measurements. Describe (or calculate!) the QRS direction in the frontal plane as inferior and left, superior, or rightward. Clinically diagnose LAHB if the QRS direction is superior. Diagnose LPHB if the QRS […]

Hemiblock Case Studies

Case 1: Left anterior hemiblock, step-by-step example Tap the arrow to view the case. Lead I is positive, so the QRS direction is to the patient’s left side (somewhere between –90 and +90). Lead AVF is negative, so the QRS direction is upward (this narrows it down to between 0 and –90). Lead II is […]

10. Hemiblock

In this material Self-study learning goals Identify the components of the conduction system. Identify the two parts of the left bundle. Describe the criteria for left anterior hemiblock. Describe the criteria for left posterior hemiblock. Identify left anterior hemiblock on the EKG. Identify left posterior hemiblock on the EKG. Overview The heart has specialized cells […]

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