1/ Let’s talk about focal atrial tachycardia #CardioTwitter.

🧵👇 by @ekgdx

#ekgdx #ecg #ekg #MedTwitter #medicine #medstudents #basic #education #graphic 2/ Focal atrial tachycardia is characterized by at least three or more consecutive ectopic P waves with similar morphology, usually arising from a single ectopic focus.

#ekgdx

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

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

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

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

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