Coronary Circulation

Question 1

Right Coronary Artery (RPM)

Answer 1

Right Coronary Artery (RPM)

•Posterior inter-ventricular branch
–Supplies blood to both ventricles

•Marginal branch
–Supplies blood to Right Ventricle and Atrium

Question 2

Left coronary artery
Name two branch
Which supply which part of the heart

Answer 2

Left Coronary Artery (LAC)

•Anterior inter-ventricular branch
–Supplies blood to both ventricles

•Circumflex branch
–Supplies blood to left ventricle and atrium

Question 3

Coronary Circulation

Which vessel returns deoxygenated blood and where to

Answer 3

Coronary Circulation

•Venous return from the heart muscle is mainly via the Coronary Sinus, which returns deoxgenated blood to the right atrium

Question 4

The pulse is

Answer 4

The pulse
Is a rhythmic pulsation of the arteries that can be felt at certain points where it passes over a bone e.g.

• Wrist (radial)
• Elbow (Brachial)It is palpated and recorded to record rate, rhythm and strength

Question 5

Factors affecting pulse rate

Answer 5

Factors affecting pulse rate:
•Sex (Gender)
•Age
•Body Temp
•Digestion
•Pain
•Emotion
•Exercise
•Blood Pressure

Question 6

Cardiac cycle sequence

Answer 6

Cardiac Cycle
The sequence of events that constitute one heart beat

• Atrial systole (0.1 second)
• Ventricle systole (0.3 second)
• Complete cardiac diastole (0.4 second)

Question 7

Normal cardiac output

Answer 7

Cardiac Output
The amount of blood ejected from the heart in one minute

• Cardiac output = stroke volume x heart rate
• Normal stroke volume in healthy adult is 70ml

:- If HR is 72 Cardiac Output is:
70ml x 72 = 5040ml (Approx 5lts)

Question 8

What is blood pressure

Answer 8

Blood pressure
•Is the force exerted by the blood on the walls of the blood vessels.

• Systemic arterial BP maintains the flow of blood into and out of the organs of the body
• BP = Cardiac Output x Peripheral resistance

Question 9

Blood pressure systole cause by what

Diastole pressure cause by what

Answer 9

Blood Pressure
•Systolic Pressure (Systole)
–Blood forced into arteries by contraction of the left ventricle
–Normal healthy adult approx 120mmHg

•Diastolic Pressure (Diastole)
–Between systolic contractions elastic recoil of the arteries
–Normal healthy adult approx 80mmHg

Question 10

Coronary circulation splits into
How many major coronary arteries
What are they

Answer 10

Coronary Circulation
Two Major Coronary Arteries-Right and Left

•Right splits into:
–Posterior inter-ventricular branch
–Marginal branch

•Left splits into
–Anterior inter-ventricular branch
–Circumflex branch

Question 11

Definition of shock

Answer 11

Definition of Shock
Insufficient perfusion of the tissues with blood carrying oxygen and nutrients causing anaerobic metabolism and thus metabolic acidosis

Factors effecting
•Blood volume
•Cardiac output
•Functioning blood vessels

Question 12

Types of shock

Answer 12

Types of shock
C

H

A

N

T

• Cardiogenic
• Hypovolaemic
• Anaphylactic
• Neurogenic
• Toxic