8 results
Cannon A Waves
 • Caused by atrial contracting against a closed tricuspid valve
 • Atrioventricular dissociation
Cannon A Waves ... a wave usually ... , it indicates AV ... activation from SVT (e.g ... #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 ... waves are enough ... to diagnose the ... #Awaves #AVNRT
EKG Interpretation Cheat Sheet
1) Rate 
 - Regular - Count-Off 
 - Irregular - Count number
EKG Interpretation ... interval < 120 ms = AV ... junction origin (e.g ... @AmyChung #EKG ... #ECG #Electrocardiogram
Approach to ECGs - Tachy/Bradyarrhythmias
Tachyarrhythmias - HR > 100
Wide
  (1) VT - DANGER
  (2)
Approach to ECGs ... Narrow - Regular ... 3 different P waves ... bradyarrhythmia #ECG ... #EKG #diagnosis
Approach to ECGs - Ischemia
MI = Biomarkers + ECG or echo/angiogram findings
Pathologic Q - 1/3 height
= Biomarkers + ECG ... than QRS - deWinter ... #Ischemia #ECG ... #EKG #diagnosis ... #Equivalents #Interpretation
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
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
External Ventricular Drains (EVDs) & ICP waveform interpretation
An EVD is a temporary closed sterile system that
is increased (e.g ... cerebral compliance (e.g ... called Lundberg waves ... • LUNDBERG A WAVES ... #neurosurgery #diagnosis