Abnormal Rhythms & ECG

Question 1

What is the conduction of the heart?

Answer 1

1) Sinoatrial (SA) node
2) Internodal pathways (atria)
3) Atrioventricular (AV) node
4) Bundle of Hi
5) Bundle branches
6) Purkinje firbres

Question 2

What does the P wave represent?

Answer 2

Atrial depolarisation

Question 3

What does the QRS complex represent?

Answer 3

Ventricular depolarisation & atrial repolarisation

Question 4

What does the T wave represent?

Answer 4

Ventricular repolarisation

Question 5

What does the PR interval represent?

Answer 5

Tracks atrial impulse through AV node, down Bundle of His and left & right bundle branches

Question 6

How to determine heart rate on an ECG?

Answer 6

300 / number of small squares between P waves

Question 7

What indicates an MI on an ECG?

Answer 7

Elevated or depression P wave or ST segment