Table 1 shows the age and the number of subjects in each ethnic group. Table 2 shows the frequency of the various ECG patterns in leads V3R to VeR. The amplitudes of the r wave, S wave, secondary r wave (qr, rSr) and Q wave (all measured to the nearest 0.5 mm) are shown in Tables 3 through 6. In all the 110 subjects, the ST segments merged imperceptibly with the ascending limbs of the T waves and an actual J point was not present. The ST segment deviation was measured 40 and 80 ms after the last QRS deflection. Table 7 shows the percentage of subjects with 0.5 to 1 mm and 1.0 mm positive ST segment deviation.

Table 1—Age Distribution of Study Population

Mean Age

Range

Ы

(yr)

No.

Chinese

17.7

17-20

38

Malay

17.8

17-22

41

Indian

18.2

17-20

31

All ethnic races

17.9

17-22

110

Table 2—Configuration of Unipolar Bight Chest Leads (in Percent of n=110)
official canadian pharmacy

rS

rSr’



qr

qS

r

qrS

T+ve

T-ve

Tiso


v3r

89

10

0

1

0

0

31

60

9



v,r

80

16

l

1

0

2

19

66

15


v5r

58

27

6

1

1

7

3

73

24


ver

37

36

14

2

1

10

2

79

19

Table 3—The r Wave Amplitudes (mm)


Median

95%
FractHe Values

Mean


Range

No.

V3R

3.0

1.0-7.0

3.0

0.5-9.0

109

V.R

2.0

0.5-4.0

2.0

0.5-6.0

108

V3

1.0

0.5-4.0

1.3

0.5-5.0

103

VeR

1.0

0.5-2.5

1.0

0.5-4.0

93

Table 4 —The s Wave Amplitudes (mm)


Median

95%
Fractile Values

Mean


Range

No.


v3r

6.0

0.5-13.0

5.9

0.5-16.0

109



V
,r

3.0

0.5-7.0

3.1

0.5-8.5

108


v5r

2.0

0.5-5.0

1.9

0.5-5.0

102


v6r

1.5

0.5-5.0

1.7

0.5-5.0

92

Table 5—Secondary r Wave (rSr’, qr) Amplitudes (mm)


Median

95%
Fractile Values

Mean


Range

No.


v3r

1.5

1.0-5.0

2.0

1.0-5.0

11


v4r

1.5

0.5-3.0

1.7

0.5-3.0

19


v*r

1.5

0.5-3.0

1.6

0.5-4.0

36


v6r

1.0

0.5-4.0

1.6

0.5-4.0

55

Table 6—The Q Wave Amplitudes (mm)

Median

95%
Fractile Values

Mean

Range

No.

V3R

1

V4R

1.5

0.5-2.0

1.4

0.5-2.0

4


v5r

0.5

0.5-2.0

0.9

0.5-2.0

15


v
eR

0.5

0.5-2.0

0.8

0.5-2.0

28

Table 7—Positive ST Deviation (mm) 40 and 80 ms after Last QRS Deflection (in Percent ofn=110)

ST Deviation

Lead

0.5-1.0
mm

>1.0
mm


v3r

40
ms

0

0

80
ms

13

0



v,r

40
ms

0

0

80
ms

5

0


v5r

40
ms
80
ms

0 0

0 0


ver

40
ms

0

0

80
ms

0

0