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Understanding the Electrocardiogram

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  2. Understanding the Electrocardiogram In Health & Disease
  3. 2.0.0 The Normal Electrocardiogram
  4. 2.2.0 PR Interval

2.2.6

As mentioned above (2.2.1), the normal PR interval is between 0.12 and 0.20 seconds (120-200 ms). It can be prolonged by a variety of physiologic, pharmacologic and pathologic causes. The PR interval in the ECG shown here is prolonged to 0.28 seconds. This indicates conduction slowing somewhere within the AV junction.

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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
    • 2.2.0 PR Interval
      • 2.2.1
      • 2.2.2
      • 2.2.3
      • 2.2.4
      • 2.2.5
      • 2.2.6
      • 2.2.7
      • 2.2.8
      • 2.2.9
      • 2.2.10
    • 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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