ER cardiology Flashcards
Osborne Waves
Hypothermia
5 Steps for ECG
Rate, Rhythm, Axis, Hypertrophy, Infarction
What to look for Rhythm
p before every QRS, QRS after every P, P and QRS intervals
Irregular rhythms
Sinus arrhythmia, Wandering pacemaker, multifocal atrial tachycardia, atrial fibrillation,
Escape Rhythms
atrial escape rhythm, Junctional escape rhythm, ventricular escape rhythm
Tachyarrhythmias
Atrial flutter(sawtooth pattern), atrial fibrillation, ventricular flutter, Ventricular fibrillation
1st degree AV block
prolonged PR interval >0.2 seconds
2nd degree AV block
Mobitz/Wenkebach . PR lengthens with a dropped QRS
2nd degree AV block Mobitz II
some P waves do not produce a QRS
3rd degree AV block
complete heart block. no P waves produce a QRS
Right BBB
R, R’ in V1 or V2
Left BBB
R, R’ in V5 or V6
What to look for in Axis
QRS + or - in leads 1 and aVF, is axis norma?
Normal Axis deviation
QRS upright in Lead 1 and in aVF
inferior MI
leads II, III, aVF, right coronary artery
anterior, anteroseptal MI
leads V1-V4, left anterior descending artery
lateral MI
v5-v6, 1, aVL, left circumflex artery
posterior MI
ST depression in V1, V2, left circumflex or right coronary artery
Anterior leads
V3, V4
Septal leads
V1, V2
inferior leads
II, III, aVF
Lateral leads
I, aVL, V5, V6
life threatening DDX
ACS, aortic dissection, PE, pneumonthorax, pericardial tamponade, Mediastinitis
Non-life threatening DDX
pleurisy, CHF, pneumonia, angina pectoris, pericarditis, endocarditis, PUD, GERD, panic disorder
Sick sinus syndrome ECG
alternating tachy/brady
SSS TX
pacemaker
SVT TX
Unstable- cardiovert. Stable- vagal manuever or carotid massage.
Drugs- adenosine 6mg IV, diltiazem or CCB, BB
Torsades TX
Magnesium sulfate
Ventricular fibrillation TX
defibrillation 360J monophasic, 120-200J Biphasic
Asystole/PEA algorithm
CPR 2 min, IV access/epi, continue CPR until shockable rhythm
VF/VTach
CPR 2 min, IV access/epi, continue CPR, amiodarone (300mg, then 150mg) if epi doesnt work
adult tachycardia w/ pulse algorithm
1) maintain airway, oxygen, cardiac monitor
2) unstable- synchronized cardioversion. consider adenosine
2) stable with wide QRS- adenosine or antiarrhythmic
3) vagal maneuvers, adenosine, BB/CCB
Adult Bradycardia w/ Pulse
1) identify and treat underlying cause
maintain airway, oxygen, monitor
2) unstable- atropine (.5 mg bolus to a max of 3 mg), dopamine or epinephrine
3) stable- monitor
Post cardiac arrest care
1) maintain oxygen
2) treat hypotension
Wandering Pacemaker
Maintains rate but P waves change
Multifocal Artrial Tachycardia
P wave changes shape and rate is >100bpm
Atrial Fibrillation
chaotic atrial spikes, no discernable P waves
Atrial Escape
skips a beat and then resumes sinus pacing
Junctional escape rhythm
skips a beat and a P wave then resumes pacing 40-60bpm with no P waves
Ventricular Escape rhythm
Skipped beat and 20-40 rate resumes with no P waves and wide QRS
Junctional Escape beat
sinus pause then a beat with no P wave
Ventricular Escape beat
sinus pause then a beat with no P wave and wide QRS
Premature junctional contractions
premature beat with no P wave or inverted P wave
Premature Ventricular contraction
premature beat with wide QRS
Paroxysmal atrial tachycardia
regular rhythm that suddenly becomes much faster, P waves will be normal if they are not buried in the T wave
Paroxysmal Junctional Tachycardia
often looks the same as SVT but no discernible P waves ever
atrial flutter
saw tooth pattern
atrial fibrillation
irregularly irregular chaotic atrial firing
ventricular fibrillation
Smooth sine waves
Ventricular fibrillation
totally erratic
Heart Block poem
if the R is far from P then you have a first degree
Longer, longer, longer drop! Then you have a Wenkebach
If some P’s just don’t get through, then you have a mobitz II
If P and Q just don’t agree, then you have a third degree
RBBB
RR’ in V1-V2
LBBB
bunny ears in V5-V6
Right axis deviation
QRS upright in lead aVF and inverted in Lead 1
Left axis deviation
QRS upright in lead I and inverted in aVF
Extreme RAD
QRS inverted in both lead I and avf
Right atrial hypertrophy
large diphasic P wae with tall initial componentq
Left atrial hypertrophy
Large diphasic P wave with a wide terminal component
ST elevation
injury
T wave inversion
Ischemia
Atropine
Bradycardia
Adenosine
6mg supraventricular tachycardia
diltiazem
atrial flutter
Ventricular arrhythmias
Amiodarone