55 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
Stimulated SA node AV ... Un-stimulated #PQ ... (mV) 0 ECG (lead ... QRS #SA node #AV ... node #Bundle of
Supraventricular Tachycardias - Pathophysiology
Conduction pathways through SA Node, Atrium, AV Node, Bundle of His, and Ventricle
through SA Node, Atrium ... , AV Node, Bundle ... Flutter • Atrial ... Fibrillation • AV ... Tachycardia • AV
The 3 Fates of a Premature Atrial Complex
 • PAC can be conducted with normal QRS
of a Premature Atrial ... conducts through the AV ... finds the right bundle ... period of the AV ... #premature #atrial
Tachyarrhythmia Framework - Differential Diagnosis
 • Narrow QRS - Regular Rhythm: Sinus tachycardia, AVNRT, Orthodromic AVRT,
flutter w/ variable AV ... tachycardia, SVT with bundle ... fibrillation with bundle ... with variable AV ... block & bundle
Hallmark ECG features of Ventricular Tachycardia (VT)
AV indicates atrioventricular; LAD, left axis deviation; LBBB, left bundle
Hallmark ECG features ... Tachycardia (VT) AV ... deviation; LBBB, left bundle ... deviation; RBBB, right bundle ... #EKG #Electrocardiogram
Second Degree Heart Block, Mobitz Type II

• p waves are normal 
• QRS complexes are usually
to concomitant bundle ... block is below the AV ... Diagnosis #Cardiology #EKG ... #ECG #Electrocardiogram
Classic Digoxin-Associated Arrhythmias
 • Atrial fibrillation with an unusually slow ventricular response
 • Atrial Fibrillation with
Arrhythmias • Atrial ... ventricular response • Atrial ... Escape Rhythm • Atrial ... Tachycardia with 2:1 AV ... #ekg #electrocardiogram
Atrioventricular (AV) Blocks

First Degree AV Block - "If your R is far from your P than
node (His bundle ... independently of the atria ... node, His Bundle ... heartblock #cardiology #ecg ... #ekg #diagnosis
Algorithm for the Evaluation of Regular, Wide-Complex Tachycardia
1. aVR: Is the initial deflection in aVR positive?
Algorithm for the ... AV Dissociation: ... there evidence of AV ... Bundle-branch morphology ... #EKG #Electrocardiogram
Cardiac conducting system 
 - Sinoatrial (SA) node normally generates the action potential, i.e. the electrical
excites the right atrium ... to excite left atrium ... atrioventricular (AV ... - From the AV ... - Right bundle