ECG Basics Flashcards
What speed should an ECG be performed at?
25mm/sec
What is the correct location of the V5 electrode
5th intracostal space, Mid-clavicular line
What is the correct location of the V2 electrode
4th intracostal space, Left sternal edge
What is the rate?
140-160 (300/2 large squares)
What does the P wave represent?
Atrial Depolarisation
What is the rate?
70-80 (13 complexes x 6)
What is the diagnosis?
Atrial Fibrillation (Irregularly irregular with no P waves)
What is the diagnosis?
Left Axis Deviation (I and III are leaving / Lead I is +ve and lead aVF is -ve)
What is the diagnosis?
1st Degree Heart Block (prolonged and fixed P-R Interval)
Which lead is this?
Lead II
What is the diagnosis?
High rate, regular but wide complexes)
What is the diagnosis?
Sinus Tachycardia (Normal P-QRS-T waves but bad baseline)
What does the T wave represent?
Ventricular Repolarisation
What is this Rhythm?
Ventricular Fibrillation (Wide and irregular complexes)
What is this lead?
aVR
What is the diagnosis?
Right Axis Deviation (I and III are returning / Lead I is -ve and lead aVF is +ve)
What is the diagnosis?
Second Degree HB –Mobitz I (elongating P-R interval with dropped beat)
What is the diagnosis?
Normal Sinus
What is the diagnosis?
P.E - Right heart strain - SIQIIITIII – Deep S and Q and TWI
What are the causes of RAD?
RBBB, Lateral MI, RVH
What is the diagnosis?
RBBB – V1 - MoRRoW
What is the diagnosis?
LBBB (V1 – WiLLiaM)
What colour is this lead?
Green (RIDE YOUR GREEN BIKE in clockwise order from right hand)
What is the diagnosis?
Pericarditis (Widespread saddle ST elevation)
What does a deep & wide Q wave indicate
Old Ischemia
What is the diagnosis?
Anterolateral STEMI (ST elevation in Leads V1 to V6)
What is the upper limit of the ORS Interval
Over 3 small squares/ 0.12 seconds
What is the abnormality?
WPW (Short PR interval and delta wave)
What is the diagnosis?
2nd Degree Block – Mobitz II (Prolonged but fixed PR interval and then dropped beats)
What does an abnormally deep S wave and tall R wave indicate?
Left Ventricular Hypertrophy (LVH)
What is the diagnosis?
Inferior STEMI (ST elevation in II, III and aVF)
What is the upper limit of the PR Interval?
Over 5 small squares/0.2 seconds
What is the diagnosis?
Hyperkalaemia (Tall T waves in all leads)
What is the diagnosis?
3rd Degree HB (Complete dissociation between P waves and QRS complexes)
What is the diagnosis?
Lateral NSTEMI (T wave inversion in I, aVL, V4, V5, V6)
What is the diagnosis?
Posterior MI (ST depression in Anterior Leads)
