Dr. Arnel Carmona @ecgrhythms
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Internal Medicine (IMG) , lover of the squiggly lines and all simplistic learning https://twitter.com/ecgrhythms - blogger @ - https://www.ekgrhythm.com/
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Atrioventricular Blocks (AV blocks) - ECG Diagnosis Summary
First Degree AV Block
 • The P wave is
Second Degree AV ... usually on the second ... Second degree AV ... aka Advanced AV ... term given is advanced
Second degree AV Block type II (aka Mobitz II)
 • There is constant PR interval (normal
Second degree AV ... Block type II ( ... location of the block ... • The QRS complex ... location of the block
High-grade AV Block aka Advanced AV Block
 • During sinus rhythm, when 2 or more P
High-grade AV Block ... Block • During ... may progress to complete ... heart block. ... #Highgrade #AVBlock
Second Degree AV Block Type I aka Mobitz I / Wenckebach 
 • Normal P waves.
Second Degree AV ... Block Type I aka ... usually on the second ... #Second #Degree ... #AVBlock #TypeI
Second degree AV Block 2:1
 • During sinus rhythm, 2 to 1 AV block manifest as
Block 2:1 • During ... degree AV block ... • A 2:1 AV block ... degree AV block ... #2nd #AVBlock #2to1
Third Degree AV Block aka Complete Heart Block
 • In sinus rhythm with complete AV block,
Third Degree AV Block ... aka Complete Heart ... Block • In sinus ... rhythm with complete ... AV block, the PP
The 4 Variants of Sinus Arrhythmia
Phasic Sinus Arrhythmia:
 • The rate increases with respiration and decreases
encompassing a QRS complex ... intervening QRS complex ... presence of AV block
Ventriculophasic Sinus Arrhythmia - ECG Diagnosis
 • The P to P interval encompassing a QRS complex
encompassing a QRS complex ... intervening QRS complex ... presence of AV block
The 4 Variants of Sinus Arrhythmia
Phasic Sinus Arrhythmia:
 • The rate increases with respiration and decreases
encompassing a QRS complex ... intervening QRS complex ... presence of AV block