Presentation on theme: "Cardiac Considerations"— Presentation transcript:
1 Cardiac Considerations Draw and label a diagram of the heartExplain the cardiac cycleDescribe how the heart worksDiscuss heart regulation at rest and during exerciseDiscuss cardiac dynamics
2 The HeartFunctionTo 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 CavaSuperior & InferiorPulmonary Vein
5 The Heart As the Atria contract blood is pushed through two valves Tricuspid Valve - Right side of heartBicuspid (Mitral) Valve - left side of heart
6 The HeartThe blood passes through the valves into the ventricles. The atria relax and the valves close.
7 The HeartThe ventricles then contract and the blood is then transported away from the heart via two arteriesAortaPulmonary 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 SystemDecreases HRSympathetic Nervous SystemIncreases HR & Contraction forceThe Endocrine System (release of hormones)Increases HR & Contraction Force
10 The ElectroCardioGram P WaveAtrial DepolarisationQRS ComplexVentricular DepolarisationT WaveVentricular Depolariastion
11 The Cardiac CycleSystoleContraction phaseDiastoleRelaxation phase
12 Cardiac Dynamics Heart Rate (HR) Stroke Volume (SV) Cardiac output (Q) The number of heart beats measured in a minuteStroke Volume (SV)The amount of blood ejected from the left ventricle in a single contractionCardiac output (Q)The amount of blood ejected from the left ventricle in a minute (SV x HR)
13 Independent Learning Session Using the Biopac packageConduct and record an ECGAnnotate the ECG by identifyingThe PQRSTAtrial and Ventricle systole & diastole
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