Cardiac Cycle & ECG

Question 1

The __________ node is located in the right atrium.

Answer 1

Sinoatrial

Question 2

Blood flows from the right atrium to the right ventricle through the _________ valve.

Answer 2

Tricuspid

Question 3

The atrioventricular valves are attached to papillary muscles via strands of fibrous tissue called _______ __________.

Answer 3

Chordae Tendineae

Question 4

What is the function of atrioventricular valves?

Answer 4

To prevent backflow of blood

Question 5

What is cardiac output?

Answer 5

The volume of blood pumped out by the left ventricle in 1 minute

Question 6

What is stroke volume?

Answer 6

The volume of blood ejected by the left ventricle at each heart contraction

Question 7

The __________ node is known as the “pacemaker” of the heart.

Answer 7

Sinoatrial

Question 8

The SA node fires at a rate of __-___bpm

Answer 8

60-100bpm

Question 9

What does an ECG represent?

Answer 9

Electrical activity of the heart

Question 10

Tachycardia

Answer 10

over 100bpm

Question 11

Bradycardia

Answer 11

less than 60bpm

Question 12

Atrial Fibrillation

Answer 12

100-175bpm

Question 13

What is a normal heart rate?

Answer 13

60-100bpm

Question 14

The ________________ node is known as the ‘gatekeeper’ of the heart

Answer 14

Atrioventricular

Question 15

What area of the heart forms the PR segment on the ECG?

Answer 15

AV node and Right and Left bundle branches

Question 16

What area of the heart forms the QRS complex on an ECG?

Answer 16

Purkinje Fibers

Question 17

Which area of the heart is responsible for the delay of the conduction between the atrium and ventricles?

Answer 17

Atrioventricular node