Editing T wave (section)

==== Frequency of inverted T-waves ====

Numbers from Lepeschkin E in <ref>{{Cite book
  | last = Antaloczy
  | first = Z
  | title = Modern Electrocardiology
  | publisher = Excerpta Medica
  | year = 1979
  | location = Amsterdam
  | pages = 401
   }}</ref>

{| class="wikitable"
|-
! 
! Age (ethnicity)
! n
! V1
! V2
! V3
! V4
! V5
! V6
|-
| '''Children'''
|-
| 
| 1 week – 1 year
| 210
| 92%
| 74%
| 27%
| 20%
| 0.5%
| 0%
|-
| 
| 1–2 y
| 154
| 96%
| 85%
| 39%
| 10%
| 0.7%
| 0%
|-
|
| 2–5 y
| 202 
| 98%
| 50%
| 22%
| 7%
| 1%
| 0%
|-
|
| 5–8 y 
| 94 
| 91%
| 25%
| 14%
| 5%
| 1%
| 1%
|-
|
| 8–16 y 
| 90
| 62%
| 7%
| 2%
| 0%
| 0%
| 0%
|-
| '''Males'''
| colspan="8" |
|-
|
| 12–13 y 
| 209
| 46%
| 7%
| 0%
| 0%
| 0%
| 0%
|-
|
| 13–14 y 
| 260
| 35%
| 4.6%
| 0.8%
| 0%
| 0%
| 0%
|-
|
| 16–19 y (whites) 
| 50
| 32%
| 0%
| 0%
| 0%
| 0%
| 0%
|-
| 
| 16–19 y (blacks) 
| 310
| 46%
| 7%
| 2.9%
| 1.3%
| 0%
| 0%
|-
| 
| 20–30 y (whites)
| 285
| 55%
| 0%
| 0%
| 0%
| 0%
| 0%
|-
| 
| 20–30 y (blacks)
| 295
| 47%
| 0%
| 0%
| 0%
| 0%
| 0%
|-
| '''Females'''
| colspan="8" |
|-
| 
| 12–13 y
| 174
| 69%
| 11%
| 1.2%
| 0%
| 0%
| 0%
|-
| 
| 13–14 y
| 154
| 52%
| 8.4%
| 1.4%
| 0%
| 0%
| 0%
|-
| 
| 16–19 y (whites)
| 50
| 66%
| 0%
| 0%
| 0%
| 0%
| 0%
|-
| 
| 16–19 y (blacks)
| 310
| 73%
| 9%
| 1.3%
| 0.6%
| 0%
| 0%
|-
| 
| 20–30 y (whites)
| 280
| 55%
| 0%
| 0%
| 0%
| 0%
| 0%
|-
| 
| 20–30 y (blacks)
| 330 
| 55%
| 2.4%
| 1%
| 0%
| 0%
| 0%
|-
|}