Thread by @ekgdx

1/ Let’s talk about the ST segment #CardioTwitter.

ST segment normally represents the interval between ventricular depolarization and repolarization.

Normal ST

✅ Usually isolectric or may vary from 0.5 mm below to 1 mm above isolectric line in L leads.

#ekgdx #Medicine

2/ ST elevation (STE)

ST changes suggesting myocardial injury:

✅ New STE ≥1 mm in all leads other than V2 or V3.
✅ New STE in V2-V3 ≥2 mm in men older than 40 years old and ≥2.5 mm in men younger than 40 years old or ≥1.5 mm in women.

#ekgdx #Medstudent #MedTwitter

3/ Types of ST segment elevation include:

✅ Convex Upward (previous pic)
✅ Horizontal (this one)
✅ Concave Upward (see next)
✅ Obliquely Straight (see next)

#ekgdx #st #MedTwitter #ecg #ekg #CardioTwitter #Medstudent

4/ ST segment elevation (Concave Upward)

#ekgdx #ecg #ekg #MedTwitter #basic #Medstudent

5/ ST segment elevation (Obliquely Straight)

#ekgdx #MedTwitter #basic #Medstudent #stelevation #mi #app

6/ ST segment depression (STD).

ST changes suggesting myocardial ischemia in the absence of LVH and bundle branch block:

✅ New STD ≥0.5 mm in two contiguous leads and/or T inversion >1 mm in two contiguous leads with R/S ratio >1.

#Medstudent #MedTwitter #ekgdx #basic #ecg

7/ Types of ST segment depression include:

✅ Horizontal (previous pic)
✅ Downsloping (this one)
✅ Upsloping (see next)

#Medstudent #MedTwitter #basic #ekgdx #stsegment #ecg #ekg #CardioTwitter

8/ ST segment depression (Upsloping).

STD causes: MI, myocardial ichemia, LVH, bundle branch block, CNS disorder, ventricular aneurysm, electrolyte disturbance, myocarditis, WPW, others.

#ekgdx #Medstudent #MedTwitter #CardioTwitter #ecg #ekg #basic

9/ The EKGs are courtesy of EKGDX App.

You can download the App here: onelink.to/7bp23c

If you want to know more about it, read the following 🧵👇.

https://twitter.com/ekgdx/status/1582375688945836032?s=46&t=WtRCN-vXsSYbVNq4RmqjHw