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The Egyptian Heart Journal

Table 4 Comparison of paced QRS duration difference as regards the paced QRS vector groups in leads I and III

From: Different lead locations guided by fluoroscopy and ECG parameters and their effect on patients functional status

Vector configuration

Paced QRS duration

(ms)

P value

Mean ± SD

A

136.5

9.4

0.001

B

142.2

7.9

C

156.4

8.6

Paced QRS vector groups “I”

“J”

Paced QRS duration (m)

P value

Mean difference

“I–J”

Std error

Group A

B

C

− 5.74035

− 19.91118*

3.02522

2.97192

0.064

0.001

Group B

A

C

5.74035

− 14.17083*

3.02522

3.14786

0.064

0.001

Group C

A

B

19.91118*

14.17083*

2.97192

3.14786

0.001

0.001

  1. According to the paced QRS vector groups and the QRS duration, there is no significant difference between groups A and B but there is markedly high significant difference between A and C and also between B and C which illuminates the result that groups A and B have significant shorter QRS duration than group C
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