35 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 ... QRS #SA node #AV ... node #Bundle of ... His Bundle branches
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
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
Cardiac conducting system 
 - Sinoatrial (SA) node normally generates the action potential, i.e. the electrical
through Bachmann’s bundle ... His and down the bundle ... - Right bundle ... - Left bundle ... - Both bundle
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 ... electrocardiogram #premature #atrial
Wolff-Parkinson White 
Preexcitation syndrome where an accessory pathway (Bundle of Kent) directly connects the atria 
and
accessory pathway (Bundle ... directly connects the atria ... to bypass the AV
Hallmark ECG features of Ventricular Tachycardia (VT)
AV indicates atrioventricular; LAD, left axis deviation; LBBB, left bundle
Tachycardia (VT) AV ... deviation; LBBB, left bundle ... deviation; RBBB, right bundle
ASD on Bubble Contrast Echocardiogram (a4c)
A patient with an anterior STEMI (take a look at the
ASD on Bubble Contrast ... Ivan_Echocardio #atrial ... #defect #ASD #Bubble
Atrioventricular (AV) Blocks

First Degree AV Block - "If your R is far from your P than
Atrioventricular (AV ... First Degree AV ... node (His bundle ... independently of the atria ... node, His Bundle
Atrial Septal Defect (ASD) with Shunting on Echocardiogram with Contrast (a4c)

An elderly patient with dyspnea -
Atrial Septal Defect ... Ivan_Echocardio #Atrial ... clinical #pocus #bubble