ECG Ne Flashcards by Bethany Cathro

Q

Normal rate of an ECG

A

25mm/s

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Q

How long do the small squares represent?

A

0.04 s

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Q

How long do the big squares represent?

A

0.2s

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Q

How do you work out the heart rate on an ECG?

A

300/ number of big squares between R waves

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Q

What does the P wave represent?

A

Atrial depolarisation

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Q

What is the normal range for the PR interval?

A

0.12 - 0.2 s

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Q

What does a short PR interval indicate?

A

Accessory pathway (Wolff-Parkinson White Syndrome)

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Q

What do prolonged PR waves indicate?

A

Heart block

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Q

What does the QRS wave represent?

A

Ventricular depolarisation

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Q

What is normal duration for the QRS wave?

A

0.12 s

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Q

What does a prolonged QRS wave indicate?

A

Bundle branch block

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Q

What does a high amplitude QRS complex indicate?

A

Ventricular hypertrophy

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Q

What do pathological Q waves indicate?

A

Few hours following MI

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Q

ST segment elevation indicates what?

A

Myocardial infarction

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Q

Which artery is affected when leads aVF, II and III are affected?

A

Right coronary artery

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Q

What artery is affected when leads aVL, leads I, V5-V6?

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A

Left circumflex artery

Q

Which artery is affected when the leads V1-2 and sometimes V3-V4?

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A

Left descending artery

Q

Which surface is monitored by V1-V2?

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A

Septal

Q

Which surface is monitored by V3-V4?

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A

Anterior

Q

Which surface is monitored by V5-V6?

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A

Lateral

Q

Which surface is monitored by aVL?

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A

Lateral

Q

Which surface is monitored by aVF?

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A

Inferior

Q

Which surface is monitored by I?

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A

Lateral

Q

Which surface is monitored by II?

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A

Inferior

Which surface is monitored by III?

Inferior

How is Atrial Fibrillation seen on ECG?

Irregular irregular, absent P Waves

Atrial Flutter on ECG?

Sawtooth baseline, regularly irregular

Wolf-Parkinson White syndrome on ECG?

Delta waves, decreased PR intervals

Heart block on ECG?

Increased PR interval

L/R BBB on ECG?

Prolonged QRS complex

Supra ventricular tachycardia on ECG?

Narrow QRS complex

Ventricular hypertrophy on ECG?

High amplitude QRS

How is NSTEMI seen on ECG?

St depression