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Prompt: Plot the tension in the left ventricle over the length of cardiac cycle, assuming that only the diameter changes during the cardiac cycle.

Prompt: Plot the tension in the left ventricle over the length of cardiac cycle, assuming that only the diameter changes during the cardiac cycle.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Prompt: Plot the tension in the left ventricle over the length of cardiac cycle, assuming that only the diameter changes during the cardiac cycle. Remember: -ventricular filling : small pressure changes (almost none) but radius change -ventricular isovolumetric contraction: big pressure changes (increasing over time) and radius changes -ventricular contraction: small pressure changes (but significant) and radius change -ventricular isovolumetric relaxation: big pressure changes (decreasing over time) and radius changes HINT: when calculating tension deltaP it is the difference between the pressure inside vs the outside of the ventricle wall. Relationship between pressure, volume and ECG Systole ejection Pressure (mmHg) Volume (mL) ECG 120 80 40 130 90+ Aortic valve opens Mitral valve closes EDV Ejection Contraction Aortic valve closes Diastole filling Mitral valve opens Filling --ESV Relaxation Filling Aortic pressure Left ventricular pressure Left atrial pressure Left ventricular volume Hint: utilize PV loop to guide you in creating the cardiac cycle diagrams. Diastole Systole LVP (mmHg) LV Vol (ml) LVP (mmHg) 100- 0 100 0 150 100 50 0 T a Aortic 2 Valve Opening Mitral Valve Closing Aortic Valve Closing ESPVR Mitral Valve Opening 0 4 b 3 P с 50 ESV 3 Time a SV -EDV 100 a Aortic Valve Closing Mitral Valve Opening LV Vol (ml) ESV Aortic 2 Valve Opening Mitral Valve b closing 1 EDV EDPVR 150
Transcribed Image Text:Prompt: Plot the tension in the left ventricle over the length of cardiac cycle, assuming that only the diameter changes during the cardiac cycle. Remember: -ventricular filling : small pressure changes (almost none) but radius change -ventricular isovolumetric contraction: big pressure changes (increasing over time) and radius changes -ventricular contraction: small pressure changes (but significant) and radius change -ventricular isovolumetric relaxation: big pressure changes (decreasing over time) and radius changes HINT: when calculating tension deltaP it is the difference between the pressure inside vs the outside of the ventricle wall. Relationship between pressure, volume and ECG Systole ejection Pressure (mmHg) Volume (mL) ECG 120 80 40 130 90+ Aortic valve opens Mitral valve closes EDV Ejection Contraction Aortic valve closes Diastole filling Mitral valve opens Filling --ESV Relaxation Filling Aortic pressure Left ventricular pressure Left atrial pressure Left ventricular volume Hint: utilize PV loop to guide you in creating the cardiac cycle diagrams. Diastole Systole LVP (mmHg) LV Vol (ml) LVP (mmHg) 100- 0 100 0 150 100 50 0 T a Aortic 2 Valve Opening Mitral Valve Closing Aortic Valve Closing ESPVR Mitral Valve Opening 0 4 b 3 P с 50 ESV 3 Time a SV -EDV 100 a Aortic Valve Closing Mitral Valve Opening LV Vol (ml) ESV Aortic 2 Valve Opening Mitral Valve b closing 1 EDV EDPVR 150
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