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Understanding the Electrocardiogram

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  1. Home
  2. Understanding the Electrocardiogram In Health & Disease
  3. 2.0.0 The Normal Electrocardiogram
  4. 2.1.0 P Wave

2.1.9

This ECG is from another patient. This P wave is also of sinus origin but its electical axis in the frontal plane is more horizontal (+10 degrees ). It is slightly more positive in lead I than in lead II and is slightly negative in lead III. This is in marked contrast to both prior tracings in which the P wave was positive in lead III.

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  • Introduction to First Edition
  • 1.0.0 Generation of the ECG
  • 2.0.0 The Normal Electrocardiogram
    • 2.1.0 P Wave
      • 2.1.1
      • 2.1.2
      • 2.1.3
      • 2.1.4
      • 2.1.5
      • 2.1.6
      • 2.1.7
      • 2.1.8
      • 2.1.9
      • 2.1.10
      • 2.1.11
      • 2.1.12
      • 2.1.13
      • 2.1.14
      • 2.1.15
      • 2.1.16
      • 2.1.17
      • 2.1.18
      • 2.1.19
      • 2.1.20
      • 2.1.21
      • 2.1.22
      • 2.1.23
      • 2.1.24
      • 2.1.25
      • 2.1.26
      • 2.1.27
      • 2.1.28
      • 2.1.29
      • 2.1.30
      • 2.1.31
      • 2.1.32
      • 2.1.33
    • 2.2.0 PR Interval
    • 2.3.0 QRS Complex
    • 2.4.0 ST segment
    • 2.5.0 T wave
    • 2.6.0 QT Interval
    • 2.7.0 U Wave
  • 3.0.0 Inter and intra-ventricular Conduction Disturbances
  • 4.0.0 Ventricular Hypertrophy
  • 5.0.0 ELECTROLYTE ABNORMALITIES, DRUG EFFECTS AND THE LONG QT SYNDROMES
  • 6.0.0 Ischemia and Infarction - Introduction (frame i and ii)
  • 7.0.0 Tachycardias- Introduction
  • 8.0.0 The Bradycardias frame i-introduction
  • 9.0.0 The ECG of Heart Murmurs-introduction
  • 10.0.0 The Electrocardiogram in the Emergency Department-Introduction
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