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 ... • During sinus ... Block • In sinus
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
Second degree AV Block 2:1
 • During sinus rhythm, 2 to 1 AV block manifest as
Block 2:1 • During ... sinus rhythm, 2 ... degree 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 ... Block • In sinus ... AV block, the PP ... #ThirdDegree #3rd ... #AVBlock #Complete
Premature atrial complex (PAC) - ECG Recognition
 • Prematurity and altered P wave morphology.
 • P
Premature atrial complex ... • Prematurity and ... look like the sinus ... interval of > 0.12 seconds ... which will be 0.12 seconds
The 4 Variants of Sinus Arrhythmia
Phasic Sinus Arrhythmia:
 • The rate increases with respiration and decreases
with respiration and ... • The P wave and ... encompassing a QRS complex ... intervening QRS complex ... presence of AV block
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 ... heart 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 ... initiated, the block ... #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 ... • Once the block ... #Paroxysmal #AVBlock
The 4 Variants of Sinus Arrhythmia
Phasic Sinus Arrhythmia:
 • The rate increases with respiration and decreases
with respiration and ... • The P wave and ... encompassing a QRS complex ... intervening QRS complex ... presence of AV block