ECG quiz

Question 1

Draw what an ECG looks like for two heart beats (label one of them)

Answer 1

Question 2

What electrical event causes the P wave?

Answer 2

depolarization of the atria

Question 3

what electrical event causes the QRS complex?

Answer 3

ventricular depolarization
(hidden is the atrial repolarization)

Question 4

what electrical event causes the T wave?

Answer 4

ventricular repolarization

Question 5

what part of the cardiac cycle does the P wave occur in?

Answer 5

in late diastole

Question 6

what part of the cardiac cycle does the QRS complex occur in?

Answer 6

during systole

Question 7

what part of the cardiac cycle does the T wave occur in?

Answer 7

early diastole

Question 8

what is the bundle of pacemaker cells that initiates P wave?

Answer 8

SA node

Question 9

what is the bundle of pacemaker cells that initiates QRS complex?

Answer 9

AV node

Question 10

what is the PR segment?

Answer 10

flat line between P and QRS complex;
time delay between atrial and ventricular contraction

Question 11

what is the PR interval?

Answer 11

P wave + PR segment
total time of atrial contraction

Question 12

what is the ST segment?

Answer 12

flatline between QRS complex and T wave
ventricles are contracting

Question 13

what is the QT interval?

Answer 13

ST segment + QRS complex
total time of systole

Question 14

what is the TP segment?

Answer 14

end of T wave -> beginning of next P wave

Question 15

what does an elevated ST segment indicative of?

Answer 15

myocardial infarction

Question 16

which segment/interval shortens the most with exercise?

Answer 16

TP segment

Question 17

what were the three varied conditions we tested?

Answer 17

1.) lay down for 20 seconds
2.) sit up for 20 seconds
3.) exercise for 60 seconds

Question 18

what is the equation for BPM?

Answer 18

Question 19

If a person’s SA node is deformed/malfunctioning, what might happen?

Answer 19

P wave may be nonexistent

Question 20

If QRS complex is missing, what might this indicate?

Answer 20

second degree heart block

Question 21

If QRS complex is delayed, what might this indicate?

Answer 21

first degree heart block

Question 22

what is an inverted T wave indicative of?

Answer 22

ischemia

Question 23

what does ECG stand for?

Answer 23

electrocardiogram

Question 24

describe the relationship between delta T and BPM

Answer 24

delt T is indirectly proportional to the value of BPM.
BPM goes up as delta T goes down

Question 25

what does the ECG measure?

Answer 25

the electrical activity of the heart