Table 3 Subgroup analyses of the association between ER and VTAs during AMI.

From: Notching early repolarization pattern in inferior leads increases risk of ventricular tachyarrhythmias in patients with acute myocardial infarction: a meta-analysis

Subgroup

Study

Number of studies

Heterogeneity

Meta-analysis

I2

p-Value

OR

95% CI

p-Value

Identification time of ER

Before AMI

4

0%

0.50

5.70

3.37–9.64

<0.00001

After AMI

3

0%

0.41

2.60

1.59–4.25

0.0001

Morphology

Notching

5

0%

0.77

8.32

4.92–14.09

<0.00001

Slurring

5

0%

0.46

1.53

0.69–3.38

0.29

Distribution

Inferior leads

3

16%

0.30

8.85

4.35–17.98

<0.00001

Follow-up duration

≤48 hours

3

15%

0.31

5.70

3.26–9.96

<0.00001

>48 hours

4

0%

0.45

2.79

1.74–4.46

<0.0001

All patients with STEMI

Yes

4

0%

0.61

2.73

1.77–4.21

<0.00001

No

3

0%

0.87

7.51

3.95–14.27

<0.00001

  1. ER = early repolarization; AMI = acute myocardial infarction; VF = ventricular fibrillation; VTAs = ventricular tachy-arrhythmias; STEMI = ST-segment elevation myocardial infarction; OR = odds ratio; CI = confidence interval.
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