AV block: 2nd degree, “fixed ratio” blocks
A review of the ECG characteristics of "fixed ratio blocks", i.e. second degree AV block with 2:1 or 3:1 conduction ratios.
Year 2020
De Quervain disease
De Quervain described chronic tenosynovitis thickening the tendon sheath of the abductor muscle of the thumb and of the extensor short muscle of the thumb.
AV block: 2nd degree, “high-grade” AV block
Second degree heart block (2nd degree AV block) with a P:QRS ratio of 3:1 or higher, producing an extremely slow ventricular rate.
Fritz de Quervain
Fritz de Quervain (1868 – 1940) was an Swiss surgeon. He described the chronic tendonitis that bears his name (De Quervain disease)
AV Block: 2nd degree, Mobitz II (Hay block)
A review of the ECG features of Mobitz II 2nd degree AV block - Originally termed Hay block (1906) by Mobitz in 1924. ECG Library LITFL
AV Block: 2nd degree, Mobitz I (Wenckebach Phenomenon)
A review of the basic ECG features, causes and pathophysiology of Mobitz I AV Block (Wenckebach Phenomenon) with some example ECGs.
Focal Atrial Tachycardia (FAT)
Atrial tachycardia is a form of supraventricular tachycardia, originating within the atria but outside of the sinus node
Premature Atrial Complex (PAC)
Review of the atrial ectopics and premature atrial contractions (PACs) with ectopic pacemaking tissue within the atria
Arrhythmogenic Right Ventricular Dysplasia (ARVD)
A review of the ECG features of arrhythmogenic right ventricular cardiomyopathy (ARVC) AKA: arrhythmogenic right ventricular dysplasia (ARVD)
Anterior Myocardial Infarction
Anterior STEMI usually results from occlusion of the left anterior descending (LAD) artery and carries the poorest prognosis of all infarct territories
Accelerated Junctional Rhythm (AJR)
AJR occurs when the rate of an AV junctional pacemaker exceeds that of the sinus node. Seen in digoxin toxicity and myocarditis
Accelerated Idioventricular Rhythm (AIVR)
AIVR -- benign rhythm that occurs when rate of an ectopic ventricular pacemaker exceeds sinus node. Often seen in reperfusion phase following anterior STEMI