1. Starter
Quiz Heart quiz…

2. Learning Objectives
Know what is meant by the conduction system
Understand the conduction system and the role it plays
Be able to verbally explain the conduction system

3. The Conduction System The cardiac muscle is MYOGENIC Myogenic
The capacity for the heart to generate its own electrical impulse
Learning Objectives
Know what is meant by the conduction system
Understand the conduction system and the role it plays
Be able to verbally explain the conduction system

4. Conduction System Anatomy
Sino-Atrial Node (SA Node)
Atrio-Ventricular Node (AV Node)
Bundle of His
Bundle Branches
Purkinje Fibres
Learning Objectives
Know what is meant by the conduction system
Understand the conduction system and the role it plays
Be able to verbally explain the conduction system

5. ECG - Electrocardiogram
ECG STAGE
Description
P Wave PQ Q R S ST T

6. Heart Conduction Video
Describes what happens in each heart beat in terms of blood flow.
Each cycle lasts on average 0.8 seconds
Two key phases
Diastole: the heart is relaxed, chambers passively fill with blood (DR)
Systole: the heart contracts forcing blood to be moved.
Learning Objectives
Know what is meant by the conduction system
Understand the conduction system and the role it plays
Be able to verbally explain the conduction system

7. The Cardiac Cycle
Diastole Relaxation of the cardiac muscle (atria then ventricles) Systole Contraction of the cardiac muscle (atria then ventricles) - Atrial & Ventricular systole Stethoscope time!!
Learning Objectives
Know what is meant by the conduction system
Understand the conduction system and the role it plays
Be able to verbally explain the conduction system

8. Plenary Learning Objectives
Know what is meant by the conduction system
Understand the conduction system and the role it plays
Be able to verbally explain the conduction system
Learning Objectives
Know what is meant by the conduction system
Understand the conduction system and the role it plays
Be able to verbally explain the conduction system

9. Place the steps in the cardiac cycle in order.
Increased ventricular pressure forces open the semi-lunar valves
Atrial Diastole:
Both atria fill with blood.
Bi/Tricuspid valves close preventing backflow of blood
Blood flows out of the ventricles via the pulmonary artery or aorta
Atrial systole:
The atria contact, forcing remaining blood into ventricles
Increased pressure forces the bi/tricuspid valves to open
Ventricular diastole: the ventricles begin to fill with blood
Ventricular diastole: Ventricles contract.

10. The Cardiac Cycle Atrial Diastole:
Both atria fill with blood.
Increased pressure forces the bi/tricuspid valves to open
Ventricular diastole: the ventricles begin to fill with blood
Blood flows out of the ventricles via the pulmonary artery or aorta
Atrial systole:
The atria contact, forcing remaining blood into ventricles
Increased ventricular pressure forces open the semi-lunar valves
Ventricular systole: Ventricles contract.
Bi/Tricuspid valves close preventing backflow of blood

11. Starter - Fill in the Blanks
Diastole is the phase of the heart. The atria fill with blood opening the and allowing blood to move into the ventricles.
Atrial systole is the of the atria forcing blood into the ventricles.
is the contraction of the ventricles forcing blood out of the heart to the lungs and body tissues.
Learning Objectives
Know what is meant by the conduction system
Understand the conduction system and the role it plays
Be able to verbally explain the conduction system

12. Fill in the Blanks
Diastole is the phase of the heart. The atria fill with blood opening the and allowing blood to move into the ventricles.
Atrial systole is the of the atria forcing blood into the ventricles.
is the contraction of the ventricles forcing blood out of the heart o the lungs and body tissues.
Relaxation
Tricuspid
Bicuspid
Valves
contraction
Ventricular
Systole
Learning Objectives
Know what is meant by the conduction system
Understand the conduction system and the role it plays
Be able to verbally explain the conduction system

13. The HR: The conduction System
The SA node fires an impulse
Atria Contract.
Impulse reaches Atrioventricular(AV) Node
AV node distributes impulse to Bundle of His
B.o.H passes impulse to Purkinje fibres
Ventricles contract
Learning Objectives
Know what is meant by the conduction system
Understand the conduction system and the role it plays
Be able to verbally explain the conduction system

16. Conduction
Causes (diastole or systole)
Event (Contracts
or relaxes)
What effect does this have?
No electrical impulse
SA node fires electrical impulse through the atria walls to the AV node. The AV node delays the response.
Bundle of His splits into two and passes into the purkinje fibres in both ventricular walls

18. Homework
Create a cue card game for Friday about the flow of blood around the heart. Annotate the article about Bradley Wiggins