1. Pressure and Volume Changes in the Cardiac Cycle L.O: to label events in the cardiac cycle on a graph Starter: Complete the ‘Heart Cycle’ worksheet by numbering the statements into the correct order.

2. Blood Pressure Systolic pressure is the pressure at which the blood leaves the heart through the aorta. Diastolic pressure is the minimum blood pressure in the aorta. Blood pressure can be measured with a sphygmomanometer: first reading is systolic and second is diastolic then represented as a fraction. SystolicDiastolic < normal< 100 < 60 Normal100-13960-89 Borderline140-15990-94 Hyper- tension >159>94

3. Volume Changes 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Time (secs) Volume ofleftventricle(cm 3 ) 150 100 0 AtrialVentricular Ventricular SystoleSystole Diastole

4. Volume Changes 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Time (secs) Volume ofleftventricle(cm 3 ) 150 100 0 AtrialVentricular Ventricular SystoleSystole Diastole Thinking task! What do you think the line would look like?

5. Volume Changes 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Time (secs) Volume ofleftventricle(cm 3 ) 150 100 0 AtrialVentricular Ventricular SystoleSystole Diastole

6. Pressure Changes 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Time (secs) Pressureof leftventricle(kPa) 150 100 0 AtrialVentricular Ventricular SystoleSystole Diastole