Criteria for EKG Validity
1. Limb Lead I is mirror of aVR
2. R Wave progression across precordial leads
  1. R Wave more prominent by lead V4
  2. Poor progression in anterior Myocardial Infarction
3. Voltage standardization mark at 1 mv
  1. Two big boxes tall (10 mm)
  2. Five small boxes wide (25 mm/sec)

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This page was written by Scott Moses, MD. This page was last revised before 5/10/08, prior to consistent tracking of revision date. This page was last published on 5/10/2008. Please send comments and questions to the editor. Contact information may be found on the page About the Family Practice Notebook. These pages are best viewed with Microsoft Internet Explorer 6.0.