Skip to content

ST segment

SHARE VIA:

The normal ST is isoelectric. Elevation or depression is judged in relation to the PR segment.

Some changes may be normal:

  • Limb lead depression or elevation up to 1mm and in left precordial leads of up to 2mm.
  • J‐depression: the J point (junction between the QRS and ST segment) is depressed without sustained ST depression i.e. depression with a gentle upward slope.
  • Early repolarisation in adolescents: the ST segment is elevated and concave in leads with an upright T wave.

Others are pathological, either:

  • a downward slope of the ST followed by a biphasic inverted T or
  • a sustained horizontal ST segment depression 0.08 sec or longer

ST segment

Pathological ST segment changes are commonly associated with T wave changes and occur in:

  • Pericarditis
  • Myocardial ischaemia or infarction
  • Severe ventricular hypertrophy (ventricular strain pattern)
  • Digitalis effect

About the authors

KEEP READING

Bells-Palsy-HEADER

Bells Palsy

Gastric-volvulus-HEADER-2

Haemophilia

Copy of Trial (1)

Bubble Wrap PLUS – March ’23

Blast injuries HEADER

Blast injuries

T1DE HEADER

Managing Hypoglycaemia in Young People with Type 1 Diabetes with an Eating Disorder (T1DE)

Gastric-volvulus-HEADER-7

Levosimendan and weaning from ECMO

Gastric-volvulus-HEADER-1-2

The PaCO2-ETCO2 Gradient

Copy of Trial (1)

The 68th Bubble Wrap

Neonatal lines HEADER

Neonatal lines and tubes

Gastric-volvulus-HEADER-4

Umbilical Dopplers: What Do They Mean?

Gastric-volvulus-HEADER-2-1

Toxic shock syndrome

Copy of Trial (1)

Bubble Wrap PLUS – February 2023

Gastric-volvulus-HEADER-6

Syphilis

Gastric-volvulus-HEADER-3-1

Ten basic dental facts you all should know

Gastric-volvulus-HEADER-1-1

Ten oncology emergencies in kids

DFTB WORLD

EXPLORE BY TOPIC

We use cookies to give you the best online experience and enable us to deliver the DFTB content you want to see. For more information, read our full privacy policy here.
[cmplz-manage-consent]