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Imaging and Data > ECG > Flashcards

ECG Flashcards

1
Q

P Wave

A

Atrial Depolarisation
Contraction of Atria
Single hump=Simultaneous contraction

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2
Q

QRS Complex

A

Ventricular Depolarisation-Contraction of Ventricles

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3
Q

T Wave

A

Ventricular Repolarisation-Ventricles return to rest state

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4
Q

PR Interval

A

Start of P wave to QRS
0.12-0.20 secs
Time taken for signal to travel from SA Node in Atria to Ventricles

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5
Q

Heart Blocks occur in which ECG segment??

A

PR Interval
Atria and Ventricles not synced

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6
Q

ST Segment

A

End of S wave to beginning of T wave
Depressed = Myocardial Ischaemia
Elevated = Myocardial Infarction

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7
Q

QRS Complex

A

How long signal takes to spread through Ventricles
Depolarisation of Septum to Left Ventricle

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8
Q

Heart Rate on ECG

A

300/Large boxes between R-R intervals

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9
Q

ECG Intervals

A

RR= To determine HR
PR= Diagnose Heart Block
ST= Diagnose MI

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10
Q

Interpret ECG

A

Rate
Rhythm
P waves?? Any abnormal?
Heart Blocks??
Wide QRS??

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11
Q

1st Degree Heart Block

A

Prolonged PR Interval

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12
Q

2nd Degree Mobitz I Heart Block

A

Progressively increasing PR interval leading to dropped beat

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13
Q

2nd Degree Mobitz II Heart Block

A

Intermittent dropped beats

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14
Q

3rd Degree Heart Block

A

Complete Dissociation between Atria and Ventricles

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15
Q

Cardiac Symptoms

A

Chest Pain Dizziness
Leg Swelling SOB
Nausea Pallor/Cyanosis
Sweating Dyspnoea
Palpatations Syncope

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16
Q

Causes of ST Elevation

A

Limb Leads- >1mm at J Point
V Leads >2mm at J Point
ST segment elevated MI
Pericarditis
Printzmetal Angina

17
Q

Causes of ST Depression

A

Myocardial Ischaemia
Ventricular Hypertrophy with Strain
Drugs-Digoxin

18
Q

ST elevation is defined as?

A

Limb Leads- >1mm at J Point
V Leads >2mm at J Point

19
Q

Causes of Right Bundle Branch Block

A

Normal
Ischaemic heart disease
Cardiomyopathy
Massive PE

20
Q

What is a pathological Q wave?

A

-Any negative deflection that precedes an R wave

-Usually indicate current or prior myocardial infarction

-Seen in leads V1-3

21
Q

Causes of small T waves

A

Hypokalaemia
Hypothyroidism
Pericardial Effusion

22
Q

Causes of large T waves

A

Early Stage Myocardial Infarction
Hyperkalaemia

23
Q

What are the Inferior Leads and what Coronary Vessel???

A

II, III, aVF
Right Coronary Artery

24
Q

What are the Lateral Leads and what Coronary Vessel???

A

I, aVL, V5, V6
Left Coronary Artery

25
Q

What are the Anterior/Septal Leads and what Coronary Vessel???

A

V1-V4
Left Anterior Descending

Imaging and Data (3 decks)

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