Week 1 (ECG) Flashcards
Primary prevention:
- specific practices for the prevention of disease or mental disorders in susceptible individuals or populations
- Preventing before it happens
Secondary prevention:
- The prevention of recurrences or exacerbations of a disease or complications of its therapy
- Preventing it happening again or getting worse
Which ventricle is larger?
Left as it is pumping to the whole body (not just to lungs)
P-wave - ____ depolarisation
atrial
QRS complex - _____ depolarisation (much larger R wave because of mm. mass)
ventricular
T wave - ventricular _______
re-polarisation
What is the U wave?
U wave not important, some people have it some don’t, doesn’t mean anything significant
Smallest square is how long?
0.04s (40ms)
Large square is how long?
0.2s (200ms)
Five large squares is how long?
1 second
HR can be calculated by counting the __ waves over a set distance
R
PR interval is the…?
Beginning of P wave to beginning of QRS complex (atrial depolarisation)
PR interval is excitation from the ____ node to the _____
SA node to ventricles
PR interval is usually _____ ms
120-200 ms
- If over 120ms, depolarisation initiated closer to AV node (abnormally fast)
The QRS complex should be ____ small squares (___ms)
3 small squares (120ms or slightly less)
The QRS complex represents depolarisation of ____
ventricles
- NOT contraction which occurs during S and T waves
Any abnormally in ventricular conduction it will _____ the QRS complex
widen
QT Interval is the beginning of the ____ wave to the end of the ___ wave
Q, T
The QT interval can vary with _____
HR
The QT interval can be prolonged with people with _____ abnormalities
electrolyte
The ___ interval is diagnostically not as important as QRS and PR intervals
QT
The ECG is made up of ____ ‘pictures’ (leads)
12
Standard leads (limb leads) are….?
I, II, aVR, aVF, aVL
Six V leads (V1-V6) go where?
Chest electrodes
