ECG mix (wk 6)

Question 1

(ECG) P wave =

Answer 1

Depolarisation to trigger atrial contraction

Question 2

QRS =

Answer 2

Ventricular depolarisation (

Question 3

T wave =

Answer 3

Ventricular repolarisation (return of nerve to resting state)

Question 4

What does a 12 Lead ECG facilitate?

Answer 4

3D map of electrical activity within the heart. It is a more sophisticated interpretation than 3 lead ECG. Allows ST segment analysis for signs of myocardial damage

Question 5

How many leads does a 12 lead ECG have?

Answer 5

10

Question 6

Where are the ECG leads placed?

Answer 6

V1 4th IC space R) sternum, V2 4th IC space L) sternum, V3 5th rib L) side, V4 under 5th rib mid clavicular line, V5 under 5th rib anterior axillary line, V6 5th rib mid axillary line

Question 7

What are the 6 steps to ECG rythym analysis?

Answer 7

Is there a pulse? Is there electrical activity? Wat is QRS rate? Is QRS wide/narrow? Is atrial activity present (p waves)? What is relationship between atrial and ventricle activity (p waves and QRS complex)?

Question 8

What is the Action potential responsible for?

Answer 8

Depolarisation of the cardiac muscle

Question 9

Which patients would require ECG or cardiac monitoring?

Answer 9

Cardiac arrest, Arrhythmias, Chest pain, Heart failure, Collapse/syncope, Shock/hypotension, Palpitations, Breathing difficulty