1267 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 node - Un-stimulated ... #PQ (mV) 0 ECG ... QRS #QRS #SA node ... #AV node #Bundle
Normal Sinus Rhythm - ECG Diagnosis
Normal sinus rhythm (NSR) is an impulse that originates in the
Sinus Rhythm - ECG ... originates in the sinus node ... ECG Recognition: ... V6 (in 12-lead ECG ... #ecg #electrocardiogram
Second Degree Heart Block, Mobitz Type I (Wenckebach)

P waves and QRS complexes are normal but... 
•
within the AV node ... Diagnosis #Cardiology #EKG ... #ECG #Electrocardiogram
The 3 Fates of a Premature Atrial Complex
 • PAC can be conducted with normal QRS
through the AV node ... period of the AV node ... cardiology #diagnosis #ekg ... #ecg #electrocardiogram
Second Degree Heart Block, Mobitz Type II

• p waves are normal 
• QRS complexes are usually
is below the AV node ... Diagnosis #Cardiology #EKG ... #ECG #Electrocardiogram
Second degree AV Block type II (aka Mobitz II)
 • There is constant PR interval (normal
the block (AV node ... diagnosis #cardiology #ecg ... #ekg #electrocardiogram
Approach to ECGs - Tachy/Bradyarrhythmias
Tachyarrhythmias - HR > 100
Wide
  (1) VT - DANGER
  (2)
Approach to ECGs ... tachy not from SA node ... brady) (3) SA node ... beats (4) SA node ... bradyarrhythmia #ECG
Wandering atrial pacemaker - ECG Diagnosis
 • The change in P wave contour is gradual
 •
atrial pacemaker - ECG ... back to the sinus node ... cardiology #diagnosis #ekg ... #ecg #electrocardiogram
Atrioventricular (AV) Blocks

First Degree AV Block - "If your R is far from your P than
conduction at the AV node ... conduction at the AV node ... leading to AV node ... heartblock #cardiology #ecg ... #ekg #diagnosis
A wandering atrial pacemaker, (WAP), is an atrial arrhythmia that occurs when the natural cardiac pacemaker
the sinoatrial node ... (SA node), the ... (AV node). ... identifiable on ECG ... Clinical #MedStudent #EKG