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 ... aka Ventricular
The 4 Variants of Sinus Arrhythmia
Phasic Sinus Arrhythmia:
 • The rate increases with respiration and decreases
with respiration and ... increases (II, Ill and ... • The P wave and ... vary at random and ... presence of AV block
Paroxysmal AV Block aka Ventricular Standstill
 • Abrupt and persistent AV block ( multiple P waves
aka Ventricular ... Standstill • Abrupt and ... or slowing of sinus ... escape, usually ventricular ... Paroxysmal #AVBlock #Ventricular
Second degree AV Block 2:1
 • During sinus rhythm, 2 to 1 AV block manifest as
Second degree AV ... sinus rhythm, 2 ... is a subtype of second ... #Second #degree ... #2nd #AVBlock #2to1
Premature atrial complex (PAC) - ECG Recognition
 • Prematurity and altered P wave morphology.
 • P
• Prematurity and ... look like the sinus ... inverted in II, Ill and ... interval of > 0.12 seconds ... which will be 0.12 seconds
Paroxysmal AV Block on ECG
 - Characterized by an abrupt and persistent AV block in the
Paroxysmal AV Block ... Characterized by an abrupt and ... persistent AV block ... or slowing of sinus ... escape, usually ventricular
The 4 Variants of Sinus Arrhythmia
Phasic Sinus Arrhythmia:
 • The rate increases with respiration and decreases
with respiration and ... increases (II, Ill and ... • The P wave and ... vary at random and ... presence of AV block
Third Degree AV Block aka Complete Heart Block
 • In sinus rhythm with complete AV block,
Third Degree AV Block ... Complete Heart Block ... • In sinus rhythm ... with complete AV block ... • The ventricular
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 ... variant of Mobitz II and ... conduction disease and
Ectopic atrial rhythm
 • The atrial rate is less than 100 bpm.
 • PR interval within
P wave during sinus ... the lower atrium and ... PRI is < 0.12 seconds