Biology of Disease

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P

Q

R

T U P

S

PR

interval

QRS

complex

ST segment

X

Y

X: 10 mm = 10 mV

Y: 5 mm = 0.2 s

I

AVR

V1 V2

AVL AVF

V3

II III

V4 V5 V6

QT interval

A)

B)

Figure 14.11 Electrocardiogram arising from (A) the 12 leads and (B) explanation of the parts

of the wave observable in the graphs. See text for details.

X]VeiZg&)/ DISORDERS OF THE CARDIOVASCULAR SYSTEM

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