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Biology-Transport in Animals > ECG's > Flashcards

ECG's Flashcards

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1
Q

What does an ECG stand for?

A

Electrocardiograms

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2
Q

How are ECG’s produced?

A

Using a electrocardiograph

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3
Q

What is an electrocardiograph?

A

A machine that records the electrical activity of the heart

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4
Q

What do the distinctive trace on ECG’s represent?

A

Atrial and Ventricle Systole and Diastole

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5
Q

What does the P wave represent?

A

Atrial Systole or Depolarisation of the Atria

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6
Q

What does the QRS complex represent?

A

Ventricular systole or Depolarisation of Ventricles

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7
Q

What does the T wave represent?

A

Ventricular diastole or Repolarisation of Ventricles

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8
Q

What does it mean if the P and R wave is bigger/higher?

A

The stronger the contraction

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9
Q

Where is one full heartbeat on an ECG?

A

Just after 1st P ends to the start of 2nd P

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10
Q

What can we use ECG’s to calculate?

A

Heart Rate

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11
Q

What equation can we use of calculate heart rate?

A

HR=60/time for 1 beat

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12
Q

How can heart problems be diagnosed?

A

By comparing a patients ECG with a normal ECG

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13
Q

What is Tachycardia?

A

When heart rate is too fast (>100 bpm at rest)

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14
Q

What happens in Tachycardia?

A

The atria start to contract before they have filled with blood so insufficient blood is pumper into the ventricles and out of the heart

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15
Q

What is Bradycardia?

A

When heart rate is too slow (<50 bpm at rest)

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16
Q

What happens in Bradycardia?

A

Insufficient blood is pumper out of the heart

17
Q

What does Bradycardia usually indicate an issue with?

A

A problem with the electrical activity of the heart

18
Q

What is Ectopic Heartbeat?

A

When the atria or ventricles contract earlier than they should so don’t have time to fill with blood before they contract

19
Q

What is Atrial Fibrillation?

A

Where there are no distinct P waves-many weak/irregular atrial contractions

20
Q

What happens in Atrial Fibrillation?

A

Less blood is pumped into the ventricles so even though the ventricles contract insufficient blood is pumped out of the heart

21
Q

What is Ventricular Fibrillation?

A

Where there are no clear QRS complex or T waves

22
Q

What happens in Ventricular Fibrillation?

A

Hardly any blood is being pumped out of the ventricles/heart-serious medical emergency

23
Q

What is Asystole?

A

No heartbeat=death

Biology-Transport in Animals (11 decks)

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