11 results
Canon A waves in a patient with AV dissociation

Occurs due to the simultaneous contraction of atria
Canon A waves in ... MD @msocoMD #CanonA ... #AV #dissociation ... #JVP #jugular # ... #Canon
Cannon A Waves on Neck Examination

Cannon a waves! Notice that it occurs randomly, not predictably w/
Cannon A Waves on ... Cannon a waves ... Cannon a waves indicate ... AV dissociation ... : 3rd deg AV block
Cannon A Waves
 • Caused by atrial contracting against a closed tricuspid valve
 • Atrioventricular dissociation
Cannon A Waves ... • The cannon ... a wave usually occurs ... SVT (e.g., junctional ... #AWaves #diagnosis
Cannon A waves during AVNRT on Physical Exam
In AVNRT, the atria and ventricles contract nearly simultaneously
Cannon A waves during ... EKG of the same ... rapid cannon a ... waves are enough ... @Hussainch #Cannon
Summary of Heart Blocks
1st Degree Heart Block:
 • Prolonged PR >200ms (5 small squares).
 • Narrow
non-conducted P wave ... Non-conducted P waves ... Treatment: Pacemaker 3rd ... #EKG #electrocardiogram ... #ecg #cardiology
Atrioventricular (AV) Blocks

First Degree AV Block - "If your R is far from your P than
200 msec) • P wave ... intervals until a P wave ... completely absent, P waves ... heartblock #cardiology #ecg ... #ekg #diagnosis
Approach to ECGs - Tachy/Bradyarrhythmias
Tachyarrhythmias - HR > 100
Wide
  (1) VT - DANGER
  (2)
DANGER Narrow - Regular ... junctional tachy not from ... 3 different P waves ... bradyarrhythmia #ECG ... #EKG #diagnosis
WOBBLER  for ECG assessment in Syncope 
W - Wolff Parkinson White 
O - Obstructed AV
WOBBLER for ECG ... O - Obstructed AV ... look for 2nd or 3rd ... Mnemonic #Syncope #EKG ... #ECG #Diagnosis
Third Degree AV Block aka Complete Heart Block
 • In sinus rhythm with complete AV block,
but the P wave ... relationship with the R wave ... #ThirdDegree #3rd ... Complete #cardiology #ekg ... #ecg #diagnosis
Approach to ECGs - VT vs. SVT - Wide Tachycardias
DDx = VT vs. SVT with BBB
All
dissociation (P ... nadir of the S-wave ... nadir of the S-wave ... VentricularTachycardia #Versus #ecg ... #ekg #cardiology