What is the entire pathway a RBC travels throughout the heart/body?
Answer- *Starts at vena cava, then heads to the right atrium, then through
the tricuspid valve (atrioventricular), then to the right ventricle, then through
the pulmonary valve (semilunar valves), then through the pulmonary tr...
WVU NSG 311 Exam 2 Cardiac Content Questions and Correct Answers What is the entire pathway a RBC travels throughout the heart/body? Answer - *Starts at vena cava, then heads to the right atrium, then through the tricuspid valve (atrioventricular), then to the right ventricle, then through the pulmonary valve (semilunar valves), then through the pulmonary trunk to get the blood oxygenated, and then comes to the pulmonary veins wi th oxygenated blood, then goes to the left atrium, then left AV valve (mitral valve;bicuspid), then to the left ventricle, then through the semilunar valve, then to the aorta, then through the body, and back to the vena cava What is the SA node known as a nd how many bpm does it consist of? Answer - *Pacemaker *60-100 bpm If the SA node shuts down, the AV node is next in line. How many bpm does the AV node average? Answer - 40-60 bpm If the SA node and AV node shuts down, the Ventricular pacemaker is next in line. How many bpm does the Ventricular pacemaker average? Answer - 30-40 bpm What is the amount of blood pumped through the body per min? Answer - 5L/min What is stroke volu me? Answer - amount of blood ejected with each heart beat What is preload? Answer - degree of stretch of cardiac muscle fibers at the end of diastole *diastole: ventricles full of blood --> stretch greatest here How do we calculate cardiac output (CO )? Answer - CO=SV x HR What is the Frank -Starling law of the heart? Answer - the more the heart fills with blood during diastole, the greater the force of contraction during systole *IMPORTANT: if the heart stretches to accommodate blood flow (ex. pt with CHF), then the condition gos back to normal but the heart will not go back to regular size What are modifiable risk factors? Answer - *diet *exercise *weight loss What are non modifiable risk factors? Answer - *sex *race *age *family hx What are some common s/sx of HF? Answer - *chest pain *dyspnea (sudden or gradual) *peripheral edema, weight gain *fatigue *dizziness *syncope *changes in LOC What do we want to do when a pt is experiencing chest pain with possible HF?
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