ECG Flashcards

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1
Q

What does an ECG record

A

electrical activity of the heart

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2
Q

What is the purpose of the coronary sinus

A

blood returning from the coronary arteries and veins into the right atrium

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3
Q

What is AF and what does it entail

A

Atrial Fibrillation and this is when the atria do not contract together

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4
Q

When do the atria relax ( repolarise)

A

When the ventricles contract ( depolarisation )

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5
Q

What does the P wave represent

A

Atrial depolarization ( contraction )

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6
Q

What does the QRS wave represent

A

ventricular depolarization ( contraction )

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7
Q

What does the T wave represent

A

ventricular repolarization ( relax )

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8
Q

What does the QRS complex represent

A

time is taken for excitation through the ventricles (0.12)

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9
Q

Where does V1 get placed

A

4th intercostal space on the right sternal edge

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10
Q

Where does V2 get placed

A

4th intercostal space on the left sternal edge

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11
Q

Where does V4 get placed

A

midclavicular line 5th intercostal space

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12
Q

Where does V3 get placed

A

between V2 and V4

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13
Q

Where does V5 get placed

A

Anterior Axillary line 5th intercostal space

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14
Q

Where does V6 get placed

A

Mid Axillary line 6th intercostal space

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15
Q

What lead does V1 and V2 record

A

Right ventricle

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16
Q

What lead does V3 and V4 record

A

Ventricular septum

17
Q

What lead does V5 and V6 record

A

Anterior and lateral wall left ventricle

18
Q

What does the aVR lead pick up

A

right atrium

19
Q

What does the aVL lead pick up

A

left lateral part of heart

20
Q

What does the aVF lead pick up

A

inferior aspect of heart

21
Q

What does Lead I and II look at

A

Left lateral

22
Q

What does Lead III look at

A

Inferior part of heart

23
Q

What are the limb leads

A

bipolar

24
Q

What is sinus arrhythmia vs sinus rhythm vs atrial fibrillation

A
Sinus rhythm ( normal rhythm of heart from SAN) regular 
sinus arrhythmia ( not normal rhythm from SAN ) irregular regular 
irregular irregular
25
Q

What is typical of Atrial Fibrillation

A
No P waves on ECG
QRS complex of normal shape 
Irregular irregular pulse
Atria not beating in harmony 
The danger of clot-forming due to stagnant blood in ventricles forming a clot
26
Q

What is a common cause of Atrial Fibrillation

A

myocardial ischemia and myocardial infarction

27
Q

What is random up and down hills on an ECG and is it bad and what could it be

A

Ventricular Fibrillation and very bad ( crash team )

28
Q

What would a completely flat line be

A

plug has come off the wall

29
Q

What is asystole

A

very gradual lines and pretty much a cardiac arrest

30
Q

What does a defibrillator do

A

Stops the heart to hope pacemaker cells can regain control

31
Q

What is the first LUB sound caused by

A

atrioventricular valves closing (mitral and tricuspid )

32
Q

What is the DUB sound caused by

A

aortic and pulmonary valves close

33
Q

Where do all heart valves lie behind

A

sternum

34
Q

Where are the valves the loudest

A

in the direction of blood flow

35
Q

Where do you listen to the aortic valve

A

RIGHT 2nd intercostal space at sternal edge

36
Q

Where do you listen to the pulmonary valve

A

LEFT 2nd intercostal space at sternal edge

37
Q

Where do you listen to the tricuspid valve

A

4th sternal edge Left or Right

38
Q

Where do you listen to the bicuspid valve

A

5th intercostal space mid clavicular line