Skip to main content

Table 1 Clinical characteristics of mutation carriers with KCNH2 A490T/K897T in family QW2648

From: Protective effect of KCNH2 single nucleotide polymorphism K897T in LQTS families and identification of novel KCNQ1 and KCNH2mutations

-

Age (yr)

Average HR (beats/min)

Low HR (beats/min)

Bradycardia (runs/24 h × beats/min)

High QTc (s)

Low QTc (s)

QTc exercise (s)

Syncope (times)

I:1

72

67

N/A

N/A

0.48

0.43

N/A

1

II:2

35

66

N/A

N/A

0.47

0.47

N/A

0

II:3

40

61

43

N/A

0.47

0.42

N/A

multiple

III:1

17

56

53

N/A

0.45

0.44

N/A

0

III:3

17

46

44

N/A

0.43

0.43

0.49

1

III:4

15

55

44

27 × 34

0.45

0.42

0.48

0

III:5

11

61

47

32 × 34

0.44

0.41

0.50

0

Mean

-

58.86

46.20

-

0.456

0.431

0.49

0

SEM*

-

22.25

1.55

-

0.007

0.007

0.006

-