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EKGDX

@ekgdx

Dec 7, 2022

1/ Let’s talk about T waves #CardioTwitter

The T wave represents typically ventricular repolarization. It is the most labile wave on the EKG surface.

Normal T wave

✅ Morphology: Asymmetric.
✅ Amplitude: ≤6 mm in limb leads and ≤10 mm in precordial leads.

#MedTwitter

2/ Tall upright T wave

Tall upright T waves are usually characterized by tall and peaked shape.

✅ Amplitude: >6 mm in limb leads and >10 mm in precordial leads.

Causes: Hyperkalemia, hyperacute MI, normal variant, prinzmetal angina, aortic stenosis, LVH, RVH, others.

#ecg

3/ Notched T wave

Possible causes: May be caused by morphological changes in the cardiomyocytes' action potential waveforms. Another causes include: Drugs (such as Dofetilide, Quinidine, Ranolazine, Verapamil), long QT syndrome, athletes, others.

#MedTwitter #MedStudentTwitter

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EKGDX

@ekgdx

Nov 30, 2022

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

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EKGDX

@ekgdx

Nov 15, 2022

@ekgdx

1/ Let’s talk about PR Interval - Segment #CardioTwitter.

The PR interval represents the time between the onset of atrial depolarization and the onset of ventricular depolarization and reflects conduction through the AV node.

🧵by @ekgdx

2/ PR Interval

Criteria

✅ Normal PR interval: 0.12 - 0.20 sec.
✅ Prolonged PR interval: >0.20 sec.
✅ Short PR interval: <0.12 sec.

The term “PQ interval” is preferred by some EKG lover because it is the period actually measured unless the Q wave is absent.

#PR #interval

3/ The PR segment is the segment between the end of the P wave and the start of the QRS complex.

Criteria

✅ Normal PR segment: Usually isolectric.
✅ PR segment elevation: ≥0.5 mm.

PR segment elevation causes: Atrial ischaemia/infarction, myopericarditis, PE, others.

#ekgdx

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EKGDX

@ekgdx

Nov 13, 2022

@ekgdx

1/ Let’s talk about P waves #CardioTwitter.

The P wave is the first positive deflection on the EKG and represents atrial depolarization. The first half represents right atrial depolarization and the second half represents left atrial depolarization.

By @ekgdx

2/ Normal P wave

Criteria

✅ Axis: 0° to +75°.
✅ Amplitude (L leads): <2.5 mm.
✅ Amplitude (P leads): <1.5 mm.
✅ Duration: 0.08 - 0.11 sec.
✅ Morphology: Upright in I, II, aVF and inverted in aVR.

#Pwaves #ecg #ekg #ekgdx #medicine #MedTwitter #MedStudentTwitter #basic

3/ Peaked P wave

The morphology is peaked with amplitude ≥2.5 mm, usually in II, III and aVF.

The peaked P wave is a typical characteristic of right atrial abnormality/enlargement.

Causes: PE, COPD, congenital heart disease, pulmonary hypertension, normal variant, others.

Read 12 tweets

EKGDX

@ekgdx

Nov 12, 2022

Acute pulmonary embolism (PE) is one of the most serious form of venous thromboembolism. The clinical presentation of PE is variable and often nonspecific making the diagnosis challenging.

1/

#CardioTwitter

Criteria

✅ Sinus tachycardia (most common).
✅ S1Q3T3 pattern (may be present up to 30% of cases).
✅ Simultaneous T wave inversions in the inferior leads and right precordial leads can be seen.
✅ Right axis deviation.
✅ RBBB (complete or incomplete).

2/

#MedTwitter #ecg

CT form a real case with PE.

3/

#medicine #MedTwitter #MedStudentTwitter #ct #pe #ekgdx #ekg #ecg

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