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
• During sinus ... Block aka Complete ... In sinus rhythm ... or slowing of sinus ... #AVBlock #cardiology
Second degree AV Block type II (aka Mobitz II)
 • There is constant PR interval (normal
Block type II ( ... location of the block ... • The QRS complex ... location of the block ... #AVBlock #TypeII
Second degree AV Block 2:1
 • During sinus rhythm, 2 to 1 AV block manifest as
Block 2:1 • During ... sinus rhythm, 2 ... AV block ... • A 2:1 AV block ... AV block type I
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 ... block, the PP and
The 4 Variants of Sinus Arrhythmia
Phasic Sinus Arrhythmia:
 • The rate increases with respiration and decreases
4 Variants of Sinus ... Arrhythmia Phasic Sinus ... encompassing a QRS complex ... intervening QRS complex ... presence of AV block
Second Degree AV Block Type I aka Mobitz I / Wenckebach 
 • Normal P waves.
Second Degree AV ... Block Type I aka ... #Second #Degree ... #AVBlock #TypeI
High-grade AV Block aka Advanced AV Block
 • During sinus rhythm, when 2 or more P
High-grade AV Block ... aka Advanced AV Block ... • During sinus ... may progress to complete ... #Highgrade #AVBlock
Sinus pause/arrest vs Sinoatrial Block

#cardiology #diagnosis #ekg #ecg #electrocardiogram #sinuspause #sinoatrialblock
Sinus pause/arrest ... vs Sinoatrial Block
Paroxysmal AV Block on ECG
 - Characterized by an abrupt and persistent AV block in the
Paroxysmal AV Block ... persistent AV block ... or slowing of sinus ... rhythm - Once the block ... initiated, the block
Paroxysmal AV Block aka Ventricular Standstill
 • Abrupt and persistent AV block ( multiple P waves
Paroxysmal AV Block ... persistent AV block ... or slowing of sinus ... • Once the block ... initiated, the block