Conducting System and ECG

Question 1

Describe pacemaker cells and current

Answer 1

Weird because cell membrane becomes MORE NEGATIVE
Na+ ions go in creating FUNNY CURRENT

Question 2

Normal cardiomyocytes have a very long…

Answer 2

Refractory period

Question 3

What is vf

Answer 3

No refractory period

Question 4

How do you fix vf

Answer 4

Defibrillation

Question 5

What ion specifically lives in the sarcoplasmic reticulum

Answer 5

Ca2+

Question 6

Describe the pathway from bradycardia to sinus rhythm

Answer 6

Sympathetic nerves to SAN
NORADRENALINE to BETA 1 receptors
ATP-> camp->ca2+ channels open

Question 7

What to the waves of the ecg represent

Answer 7

P - atrial depolarisation
Qrs - ventricular depolarisation
T - ventricular repolarisation

Question 8

What to beta blockers end with

Answer 8

• olol

Question 9

Give an example of a calcium channel blocker

Answer 9

Ammlodopine

Question 10

How would you identify atrial fibrillation on ecg

Answer 10

No p waves

Question 11

Which waves are sometimes absent in normal ecg

Answer 11

Q

Question 12

What does the pr interval represent

Answer 12

Time taken to travel between San and avn

Question 13

Which is the rhythm strip on ecg

Answer 13

V2