13 results
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 ... a waves are enough ... #Awaves #AVNRT ... #PhysicalExam #JVP
Cannon A Waves
 • Caused by atrial contracting against a closed tricuspid valve
 • Atrioventricular dissociation
Cannon A Waves ... a wave usually ... , it indicates AV ... atrial activation from ... #AWaves #diagnosis
Lead AVR on ECG
1. Acute myocardial infarction: ST elevation > 1.5 mm in aVR, indicative of
Lead AVR on ECG ... atrial injury from ... overdose: Prominent R wave ... prominent terminal R wave ... #electrocardiogram
STEMI Equivalents on ECG
 • Conventional STEMI - Elevation of ST segment at (or 40-60 ms
J point • De Winter ... ST elevation in aVR ... indistinguishable from ... #EKG #diagnosis ... differential #cardiology #electrocardiogram
Visual Guide to AV Nodal Reentrant Tachycardia (AVNRT) - Pathophysiology
 - Dual AV nodal physiology is
Visual Guide to AV ... stays inside the AV ... In most case P wave ... as 'pseudo-s' wave ... and 'pseudo-r' wave
Digoxin effect on Electrocardiogram (EKG)
Digoxin is a cardiac glycoside from the foxglove leaf
Mechanism
 - Inhibits Na-K
(EKG) Digoxin ... cardiac glycoside from ... - Decreases AV ... or biphasic T waves ... #EKG #Cardiology
Approach to ECGs - Ischemia
MI = Biomarkers + ECG or echo/angiogram findings
Pathologic Q - 1/3 height
Equivalents / Don't Miss Signs ... - hyperacute T waves ... bigger than QRS - deWinter ... T waves - starts ... #electrocardiogram
Atrioventricular (AV) Blocks

First Degree AV Block - "If your R is far from your P than
your R is far from ... 200 msec) • P wave ... intervals until a P wave ... completely absent, P waves ... #ekg #diagnosis
Approach to ECGs - VT vs. SVT - Wide Tachycardias
DDx = VT vs. SVT with BBB
All
is positive in aVR ... (> 160ms) - AV ... - The distance from ... nadir of the S-wave ... nadir of the S-wave
Supraventricular Tachycardia EKG

Here’s a great ECG case of a 50-year-old lady who presented with palpitations

Her heart
Supraventricular Tachycardia EKG ... distinguishing QRS from ... T wave in some ... @EM_RESUS #AVRT ... #ECG #Electrocardiogram