resistance (PR) constant? Does this mirror what we see in real life, and if not--what is different in about this response in a healthy adult? heart rate equals cardiac output, so when heart rate increases, cardiac output increases. This is because when your heart is beating faster, more output is being created. Blood pressure stays the same when PR is constant. In real life, when PR is raised, blood pressure is raised 9 Question #9: Describe the feedback loop between autonomic activity (both sympathetic and parasympathetic), heart rate, peripheral resistance, and blood pressure. The sympathetic nervous system effects heart-rate acceleration, increased cardiac contractility, reduced venous capacitance, and peripheral vasoconstriction.The parasympathetic nervous system affects the cardiovascular system by slowing the heart rate through vagal innervation 10 Question #10: What is the Frank-Starling law of the heart, and how does it relate to the formula BP = CO x PR? The law states that the stroke volume of the heart increases in response to an increase in the volume of blood in the ventricles, before contraction, when all other factors remain constant; this relates to Blood pressure= cardiac output x peripheral resistance in that the blood pressure reacts in response with the other factors 11 Question #11: What element of the BP = CO x PR formula is altered in atrial fibrillation? What evidence do you see on the ECG that supports your hypothesis?
- Summer '20