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6. Patients with what underlying condition cannot undergo Fick’s method of Cardiac output measurement?
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- 13. Explaine the factors which determine cardiac output.1. Discuss the basic components of cardiac rehabilitation9. Explain the effects of exercise on each of the following components of an EKG: Why? Increases or Decreasess with Exercise? Duration of RR Interval (time of one heartbeat) Heart Rate (calculated) Duration of P wave Duration of QRS complex Duration of T wave Duration of PR segment Duration of ST segment Duration of TP segment
- 9. Patients with diastolic heart failure have abnormalities in LV relaxation and distensibility that can be characterized in PV loops, and by echocardiography. Which phase in the PV loop represents the time of isovolumetric relaxation of the LV that can be affected during diastolic failure? 120 LV Pressure 80 (mm Hg) 40 в 20 60 100 140 180 220 LV Volume (ml) A. A B. C. D. D10. An EKG with a higher QRS complex than normal... A)None of these are true B)Must mean that the end diastolic volume is higher C)Must mean that the ventricular contraction is stronger than normal D)Must mean that the person is exercising and innervating more cardiomyocytes E)Must mean that atrial repolarization is smaller than usual so we see more ventricular repolarization10. Explain the pressure changes which occur during the cardiac cycle and their relationship to the flow of blood through the heart and blood vessels. Mention The Wigger’s diagram
- 6. The diagram shows stroke volume as a function of right atrial pressure. The solid curve shows normal cardiac function. Movement from point X on the solid curve to point Y on the dashed curve is most likely to be caused by which of the following physiologic changes? A) Decreased heart rate B) Increased afterload C) Increased vascular volume D) Increased venous return E) Stimulation of the sympathetic nerves to the heart Stroke volume (mL) 110 90- 70- 50 30 10- 1 2 3 Right atrial pressure (mm Hg) 422. Define Ventricular Fibrillation. Describe what is happening electrically during VF.1. Explain the Frank-Starling law of the heart. mention how the role of stretch on the cardiac contractile tissue has on the force of contraction. Explain how this allows for the matching of venous return and stroke volume. Mention end-diastolic-volume (EDV),end-systolic-volume (ESV), venous return, preload, afterload, and Starling curves.
- 7. State which of the 4 factors that affect resistance to blood flow changes the most on a minute to minute basis: 8. State in words AND in the simplified equation of Poiseuille's Law the relationship between blood vessel radius and resistance. a. Radius is directly related to resistance. (Insert either "directly" or "indirectly".) Thus ...5. What is hyperkalemia and what is the clinical term for its chronotropiceffect on the heart?4) A) Calculate the Systolic Pressure of a 65 years old man if the diastolic blood pressure is 90 mmHg and stroke volume of 70 ml/beat. Total Peripheral Resistance is 19mmHg.min/L. Assume person is healthy and has a normal heart rate. B) Calculate Left ventricular end-diastolic volume (LVEDV) when the mean ejection fraction is 80 % ?