14 results
Stimulated
SA node
AV node -
Un-stimulated
#PQ
(mV) 0
ECG (lead II)
QRS
#QRS
#SA node
#AV node
#Bundle of His
Bundle branches
#Purkinje fibers
#QRS
#ST
Bundle branches #Purkinje
Second Degree Heart Block, Mobitz Type II

• p waves are normal 
• QRS complexes are usually
generally in the His-Purkinje
Wide Complex Tachycardia - ECG Definition and Causes
 • Wide Complex Tachycardia (WCT) is a cardiac
aberrancy in the His-Purkinje
Anatomical Differential Diagnosis for Arrhythmias
 • SA node: Sinus bradycardia, Sick Sinus Syndrome (SSS)
 • AV
1 2°) • His-purkinje
Cardiac conducting system 
 - Sinoatrial (SA) node normally generates the action potential, i.e. the electrical
branches terminate in Purkinje
Bradycardia - Differential Diagnosis Framework

BRADI Mnemonic
 • BRASH/Hyperkalemia
 • Reduced oxygen/Glucose/Temp
 • ACS
 • Drugs
 •
Hemochromotosis • His-Purkinje
Bradycardia - Differential Diagnosis 
 • Cardiac disease: Myocardial ischemia / infarction, Myocarditis, Congenital disorders, Cardiomyopathies,
Cardiomyopathies, His-Purkinje
Hyperuricemia - Differential Diagnosis Algorithm
Primary - Over-production
     • Increased turnover of nucleotides
Primary
Drug-induced • High purine
Uric Acid Homeostasis
In the liver, purines are metabolized to uric acid. The last step in purine
The last step in purine
Atrioventricular (AV) Blocks

First Degree AV Block - "If your R is far from your P than
(His bundle or Purkinje