Exam 2: Cardiac Function

Question 1

Vasovagal syncope

Answer 1

fainting because of drop in HR/BP, this can be due to bearing down, emotional distress, seeing blood, heat

Question 2

What is a 12 lead EKG?

Answer 2

12 views of the heart from 12 different POVs

Question 3

What is electrocardiology?

Answer 3

pattern recording, Lead II shows characteristic waves and intervals, measures electrical function

Question 4

What is the P wave?

Answer 4

atrial depolarization

Question 5

What is the PR interval?

Answer 5

time from when atria start depolarizing to the time the ventricles start depolarizing

Question 6

What is the QRS complex?

Answer 6

ventricular depolarization - need most power here to get blood out of heart

Question 7

What is the T wave?

Answer 7

ventricular repolarization

Question 8

What does ANP do?

Answer 8

Atrial natriuretic peptide (ANP) is a cardiac hormone -> atrial stretching, excretion of sodium and volume reduction

Question 9

What does BNP do?

Answer 9

Brain natriuretic peptide (BNP) -> ventricular distension, excretion of sodium and volume reduction

Question 10

What are clinical tests of cardiac function?

Answer 10

MRI/CT, Echocardiography, SPECT, Angiography or coronaries, bloodwork