ECG Flashcards
How long is a standard ECG strip?
10 seconds
How long is one small square in seconds?
0.04
How long is a one big square in seconds?
0.2seconds
How long should a p wave be?
<120ms or <3 small squares
How long should the PR interval be?
Between 120ms and 200ms
Between 3 and 5 small squares
How long should QRS complex be?
<120ms or <3 small squares
How long should the QT segment be?
In males <400ms or <2 big squares
In females <440ms or <2 big squares and one small
What is this?
Atrial Fibrillation
What is this?
Wolff Parkinson white
Delta waves are present which shows pre excitation syndrome
What is this?
Ventricular tachycardia
Broad QRS complexes
What is this?
1st degree heart block
Continuous prolonged PR intervals >120ms
What is this?
2nd degree heartblock type 1
Progressive prolongation of PR interval until a ventricular contraction is completely missed
What is this?
Second degree heart block Mobitz type 2
Intermittent conduction of P waves with no elongated PR interval
What is this?
3rd degree heart block
Complete dissociation between atrial and ventricular depolarisation
What is this?
Ventricular fibrillation
What is this?
Left bundle branch block
Notice the WilliaM pattern with the W1 in V1 and M in V6
What is this?
Right bundle branch block
Notice the MarroW with M in V1 and W in V6
What is this?
Anterior STEMI
ST elevation in leads V1-V4
Affects the left anterior descending artery
What is this?
Lateral STEMI
ST elevation in leads I, aVL and V5 and 6
Due to occlusion of circumflex artery
What is this?
Inferior STEMI
ST elevation in leads II, III, avF
Occlusion of right coronary artery
What is this?
Left ventricular hypertrophy
Look at the overlapping of the QRS complexes and there is QRS complex widening in other leads
What is this?
Pulmonary Embolus
Deep S wave in lead I
Q wave in lead III
Inverted T wave in lead III
What is this?
Hyperkalaemia
Tall Tented T waves
What are normal ECG variants?
Sinus arrythmia
Right axis deviation (tall and thin)
Left axis deviation (short and obese)
Partial RBBB
