Info

PR interval (ms)

94 ± 27 (50-120)

3- to 5-year-old: 110-150 5- to 9-year-old: 120-160

QT interval (ms)

256 ± 69 (150-340)

HR = 150: 210-280 HR = 100: 260-350

HRA-LRA (ms)

10 ± 0 (10)

2- to 5-year-old: 6-38 6- to 10-year-old: 0-41

LRA-H (ms)

63 ± 2(60-65)

2- to 5-year-old: 45-101 6- to 10-year-old: 40-124

H-V (ms)

25 ± 7 (20-35)

2- to 5-year-old: 27-59 6- to 10-year-old: 28-52

Source: Adapted from ref. 38.

H, His; HR, heart rate; HRA, high right atrium; LRA, low right atrium; V, ventricle.

Source: Adapted from ref. 38.

H, His; HR, heart rate; HRA, high right atrium; LRA, low right atrium; V, ventricle.

Table 4

Tabulation of Activation Timing

Table 4

Tabulation of Activation Timing

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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