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Atrioventricular Blocks (AV blocks) - ECG Diagnosis Summary
First Degree AV Block
 • The P wave is
• The QRS complex ... aka Complete Heart ... rhythm with complete ... #AVBlock #cardiology ... #ekg #ecg #diagnosis
Third Degree AV Block aka Complete Heart Block
 • In sinus rhythm with complete AV block,
aka Complete Heart ... Block • In sinus ... #AVBlock #Complete ... #cardiology #ekg ... #ecg #diagnosis
High-grade AV Block aka Advanced AV Block
 • During sinus rhythm, when 2 or more P
• During sinus ... may progress to complete ... #Highgrade #AVBlock ... #Advanced #diagnosis ... #cardiology #ecg
Almost any type of cardiac arrhythmia is seen in digitalis toxic­ity. However, type II second-degree atrioventricular
sinus bradycardia ... first-degree AV block ... Complete heart block ... sino-atrial (SA) block ... #Diagnosis #Cardiology
Summary of Heart Blocks
1st Degree Heart Block:
 • Prolonged PR >200ms (5 small squares).
 • Narrow
Treatment: Pacemaker 3rd ... Degree, Complete ... HeartBlocks #Types #Classification ... degrees #summary #Diagnosis ... #ecg #cardiology
Causes of ST Segment Elevation - Differential Diagnosis Framework

STEMI:
 • Upsloping convex STE: "Pardee's sign" +
Bundle Branch Block ... precedes the QRS complex ... or in-complete ... bundle-branch block ... #cardiology #ecg
The 4 Variants of Sinus Arrhythmia
Phasic Sinus Arrhythmia:
 • The rate increases with respiration and decreases
encompassing a QRS complex ... intervening QRS complex ... presence of AV block ... #Arrhythmia #cardiology ... #diagnosis #ekg
The 4 Variants of Sinus Arrhythmia
Phasic Sinus Arrhythmia:
 • The rate increases with respiration and decreases
encompassing a QRS complex ... intervening QRS complex ... presence of AV block ... #Arrhythmia #cardiology ... #diagnosis #ekg
Premature Ventricular Complexes (PVC's) - Summary Framework

Why PVCs?  Can be the first manifestation of cardiac
Premature Ventricular Complexes ... Bundle branch block ... : • Broad QRS complex ... #Ventricular #Complexes ... #differential #cardiology