First Degree Heart Block
Defined as PR interval > 200ms, commonly caused by AV nodal blocking drugs
Tag AV Block
Karel Frederik Wenckebach
Karel Frederik Wenckebach (1864-1940) Dutch physician. Eponymously affiliated with Wenckebach block (Mobitz type I AV block).
Luigi Luciani
Luigi Luciani (1840 – 1919) was an Italian neuroscientist. discovery referring to the phenomena as ‘Luciani periods‘ (Wenckebach AV block)
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.
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.
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.
PR Interval
Assessment / interpretation of the EKG PR interval. ECG PR interval is the time from the onset of the P wave to the start of the QRS complex.
ECG Mastery: High degree AV blocks
Medmastery are providing LITFL readers with a series of FOAMed courses from across their website. In this video, we look at high degree AV blocks on the ECG; the types of blocks and their clinical implications
Rytand murmur
Rytand murmur: Mid-late blowing diastolic murmur heard occasionally in patients with complete atrioventricular heart block.
Alfred Lewis Galabin
Alfred Lewis Galabin (1843-1913) English obstetric physician. Using an apexcardiogram he was documented atrioventricular (AV) block in humans.
Diagnosis, Wenckebach Squared?
Find out the solution to LITFL's most recent ECG Exigency, is the diagnosis Wenckebach? Wenckebach AV block SA block