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
• The QRS complex ... may progress to complete ... aka Complete Heart ... Block • In sinus ... rhythm with complete
A Summary slide of Sinoatrial Rhythms 
 • Sinus Rhythm
 • Sinus Arrhythmia
Sinus Rhythm ... • Sinus Arrhythmia ... Wandering Atrial Pacemaker ... Premature Atrial Complexes ... • Sinoatrial Blocks
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 ... #Complete #cardiology
The 4 Variants of Sinus Arrhythmia
Phasic Sinus Arrhythmia:
 • The rate increases with respiration and decreases
is gradual and rhythmic ... encompassing a QRS complex ... intervening QRS complex ... presence of AV block ... Wandering Atrial Pacemaker
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 ... rhythm, when 2 ... may progress to complete
The 4 Variants of Sinus Arrhythmia
Phasic Sinus Arrhythmia:
 • The rate increases with respiration and decreases
is gradual and rhythmic ... encompassing a QRS complex ... intervening QRS complex ... presence of AV block ... Wandering Atrial Pacemaker
Second degree AV Block type II (aka Mobitz II)
 • There is constant PR interval (normal
Second degree AV Block ... location of the block ... • The QRS complex ... location of the block ... Second #Degree #AVBlock
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 ... #Paroxysmal #AVBlock
Paroxysmal AV Block aka Ventricular Standstill
 • Abrupt and persistent AV block ( multiple P waves
Paroxysmal AV Block ... persistent AV block ... or slowing of sinus ... rhythm ... #Paroxysmal #AVBlock
Second degree AV Block 2:1
 • During sinus rhythm, 2 to 1 AV block manifest as
Second degree AV Block ... 2:1 • During sinus ... rhythm, 2 to 1 ... AV block manifest ... • A 2:1 AV block