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Third Degree AV Block aka Complete Heart Block
 • In sinus rhythm with complete AV block,
• In sinus rhythm ... by a junctional pacemaker ... #ThirdDegree #3rd ... #ecg #diagnosis ... #electrocardiogram
The 4 Variants of Sinus Arrhythmia
Phasic Sinus Arrhythmia:
 • The rate increases with respiration and decreases
is gradual and rhythmic ... presence of AV block ... Wandering Atrial Pacemaker ... several cycle the pacemaker ... #ecg #electrocardiogram
Approach to ECGs - Tachy/Bradyarrhythmias
Tachyarrhythmias - HR > 100
Wide
  (1) VT - DANGER
  (2)
arrest - escape rhythms ... - ventricular pacemaker ... bradyarrhythmia #ECG ... #electrocardiogram ... #cardiology #differential
Summary of Heart Blocks
1st Degree Heart Block:
 • Prolonged PR >200ms (5 small squares).
 • Narrow
Narrow & regular rhythm ... Narrow & irregular rhythm ... 3rd Degree, Complete ... #electrocardiogram ... #ecg #cardiology
The 4 Variants of Sinus Arrhythmia
Phasic Sinus Arrhythmia:
 • The rate increases with respiration and decreases
is gradual and rhythmic ... presence of AV block ... Wandering Atrial Pacemaker ... several cycle the pacemaker ... #ecg #electrocardiogram
Approach to ECGs
Check
 - Age, gender, name
 - 25mm/s; 10mm/mV
 - 1mm = 40ms; 0.1 mV
Rate
QRS in 6s x 10 Rhythm ... ) - HiPR: AV block ... ectopic atrial pacemaker ... #electrocardiogram ... #cardiology #interpretation
Atrioventricular Blocks (AV blocks) - ECG Diagnosis Summary
First Degree AV Block
 • The P wave is
• In sinus rhythm ... by a junctional pacemaker ... an infra-Hisian pacemaker ... atrioventricular #blocks #AVBlock ... #electrocardiogram
Palpitations - Differential Diagnosis Framework

What?
• It is an unpleasant awareness or sensation that the heart is
Palpitations - Differential ... exam • 12-lead ECG ... Heart Rate and Rhythm ... valve prolapse • Pacemaker-mediated ... Palpitations #Cardiology #Differential