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Cardiac Considerations

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Presentation on theme: "Cardiac Considerations"— Presentation transcript:

1 Cardiac Considerations
Draw and label a diagram of the heart Explain the cardiac cycle Describe how the heart works Discuss heart regulation at rest and during exercise Discuss cardiac dynamics

2 The Heart Function To provide the pumping action and force for blood transportation around the vascular system

3 The Heart Myocardium - Cardiac Muscle Four Chambers Two Upper - Atria
Two Lower - Ventricles

4 The Heart Blood flows into the upper chambers via three veins
Vena Cava Superior & Inferior Pulmonary Vein

5 The Heart As the Atria contract blood is pushed through two valves
Tricuspid Valve - Right side of heart Bicuspid (Mitral) Valve - left side of heart

6 The Heart The blood passes through the valves into the ventricles. The atria relax and the valves close.

7 The Heart The ventricles then contract and the blood is then transported away from the heart via two arteries Aorta Pulmonary Artery

8 The Heart Beat Sinoatrial (SA) Node Atrioventricular (AV) Node
AV bundle ( Bundle of His) Purkinje Fibres

9 Control of the Heart Beat
The Parasympathetic Nervous System Decreases HR Sympathetic Nervous System Increases HR & Contraction force The Endocrine System (release of hormones) Increases HR & Contraction Force

10 The ElectroCardioGram
P Wave Atrial Depolarisation QRS Complex Ventricular Depolarisation T Wave Ventricular Depolariastion

11 The Cardiac Cycle Systole Contraction phase Diastole Relaxation phase

12 Cardiac Dynamics Heart Rate (HR) Stroke Volume (SV) Cardiac output (Q)
The number of heart beats measured in a minute Stroke Volume (SV) The amount of blood ejected from the left ventricle in a single contraction Cardiac output (Q) The amount of blood ejected from the left ventricle in a minute (SV x HR)

13 Independent Learning Session
Using the Biopac package Conduct and record an ECG Annotate the ECG by identifying The PQRST Atrial and Ventricle systole & diastole

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