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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A Summary slide of Sinoatrial Rhythms 
 • Sinus Rhythm
 • Sinus Arrhythmia
Sinus Rhythm ... • Sinus Arrhythmia ... Pacemaker • Multifocal ... Atrial Complexes ... • Sinoatrial Blocks
Atrioventricular Blocks (AV blocks) - ECG Diagnosis Summary
First Degree AV Block
 • The P wave is
Block • In sinus ... rhythm with complete ... by a junctional pacemaker ... an infra-Hisian pacemaker ... rhythm
The 4 Variants of Sinus Arrhythmia
Phasic Sinus Arrhythmia:
 • The rate increases with respiration and decreases
is gradual and rhythmic ... intervening QRS complex ... presence of AV block ... Wandering Atrial ... Pacemaker: •
Premature atrial complex (PAC) - ECG Recognition
 • Prematurity and altered P wave morphology.
 • P
Premature atrial ... complex (PAC) - ... look like the sinus ... interval of > 0.12 seconds ... which will be 0.12 seconds
Ectopic atrial rhythm
 • The atrial rate is less than 100 bpm.
 • PR interval within
Ectopic atrial rhythm ... P wave during sinus ... rhythm ... pacemaker is in ... PRI is < 0.12 seconds
Multifocal Atrial Rhythm vs Wandering Atrial Pacemaker
Mutifocal Atrial Rhythm / Multifocal Atrial Tachycardia:
Belong to a group
Rhythm vs Wandering ... Atrial Pacemaker ... Rhythm / Multifocal ... OF SINUS ARRHYTHMIA ... focus from the sinus
The 4 Variants of Sinus Arrhythmia
Phasic Sinus Arrhythmia:
 • The rate increases with respiration and decreases
is gradual and rhythmic ... intervening QRS complex ... presence of AV block ... Wandering Atrial ... Pacemaker: •
Wandering atrial pacemaker - ECG Diagnosis
 • The change in P wave contour is gradual
 •
Wandering atrial ... shifts back to the sinus ... • Variant of sinus ... appreciate this rhythm ... wap #Wandering #atrial
Third Degree AV Block aka Complete Heart Block
 • In sinus rhythm with complete AV block,
Third Degree AV Block ... Block • In sinus ... rhythm with complete ... by a junctional pacemaker ... an infra-Hisian pacemaker
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 ... could either be second ... #Second #degree