ECG Flashcards
Left Bundle Branch Block - Where is this effected and what do you classically see in an ECG?
Below the bundle of his
WiLLiaM - V1 and V6
Also present in ST depression an
Causes of LBBB and RBBB?
MI Cardiomyopathy Aortic stenosis PE's Degenerative changes Fibrosis
What do you see in a LBBB and where on an ECG?
MaRRoW - V1 and V6
Name the 3 types of atrioventricular blocks
Type 1 - P waves are longer than 200ms (they should be 0.02seconds) (usually harmless)
Type 2 - Mobitz type 1, Wernbach (going, going, gone P waves, PR interval gets longer and then drops). Mobitz type 2, Hay P waves are always present and then suddenly one disappears.
Type 3 - Complete Heart block - asynchrony between the P and QRS complexes.
Supraventricular Tachycardia?
Narrow QRS complexes
Missing Ps
Occurs in the atrium or above the AV nodes
Ventricular Tachycardia
Broadbased QRS complex
Dangerous
can be pulseless
BIG UPSIDE DOWN U’S
Ventricular fibrillation
Fibrillation is quivering
Has no structure, can come from a torsades de pointes. Is always dangerous!
Atrial Fibrillation
P waves quivering.
Irregularly regular
Atrial flutter
Saw tooth pattern!
ECG changes in STEMI
S T Elevation in 2 contiguous leads
Myocardial Infarction
MI infarction changes
Hyper-acute t waves for the first few mins
ST elevation in 2 contiguous leads
New onset LBBB
ST depression = posterior MI
V1 - V4 ECG tertiary changes
LAD (Left anterior descending artery)
Tertiary changes in I, II and AVF
Inferior (F = floor), right coronary
Tertiary changes in I, V4-V6 and AVL
L = left,
LAD (V4) and left circumflex (anterolateral) (V5-V6)
if it is only in leads I, avL and V5-V6 then it is just left circumflex.
Leads V1-V3
Posterior
