AS Revision Flashcards Cardiovascular System. 0.0 / 5 ? Physical EducationAnatomy & physiologyASOCR Created by: DanpcCreated on: 26-03-13 15:23 Diastole Relaxation of the cardiac muscle 1 of 20 Atrial Systole Contraction of the upper chambers of the heart 2 of 20 Sino-atrial (SA) node Structure responsible for initiating the cardiac impulse 3 of 20 Atrio-ventricular node Structure responsible for delaying the cardiac impulse allowing the atria to finish contracting 4 of 20 Heart Rate (HR) The number of times the heart ventricles contract per minute (bpm) 5 of 20 Stroke Volume (SV) The volume of blood ejected from the left ventricle per beat (ml) 6 of 20 Cardiac Output (Q) The volume of blood ejected from the left ventricle per minute, CO (Q) = HR x SV (l/min) 7 of 20 Vascular Shunt The redistribution of cardiac output between the organs and muscles from rest to exercise 8 of 20 Starling’s Law This states that stroke volume is dependent on venous return. An increase in venous return causes an increase in stroke volume 9 of 20 Venous Return The return of deoxygenated blood to the heart 10 of 20 Arteriosclerosis Loss of elasticity in the blood vessel walls which reduces their 11 of 20 Coronary Heart Disease General term for all diseases relating to the coronary blood vessels 12 of 20 Heart Attack Total blockage of a coronary artery usually causing permanent 13 of 20 Angina A partial blockage of a coronary artery causing chest pain 14 of 20 Atherosclerosis Fatty plaques on the artery walls causing a narrowing of blood 15 of 20 Conduction system this controls the cardiac cycles / involves structures that pass a cardiac impulse through the heart walls 16 of 20 Hypertension long-term high blood pressure / this accelerates arteriosclerosis/ this increases strain on the heart 17 of 20 Pocket valves prevent the backflow of blood / located in veins 18 of 20 Ventricular systole type of contraction of the heart / contraction of the ventricles 19 of 20 Atrio-Ventricular (AV) node The structure responsible for delaying the cardiac impulse transmission to the ventricles allowing atrial systole to occur. 20 of 20
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