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Components of the heart - ANSWER ✔✔the pump
the electrical system
the vascular system
the blood volume
serum lipid levels - ANSWER ✔✔fats can clog blood vessels and
decrease blood flow. LDL should be less than 130. HDL greater than 45.
total cholesterol lower than 200.
, Serum Electrolytes - ANSWER ✔✔can affect the conduction of the
heart
Hemoglobin - ANSWER ✔✔An iron-containing protein in red blood
cells that reversibly binds oxygen.
Creatinine kinase and troponin - ANSWER ✔✔is elevated with
cardiac cell death. usually indicates an MI
Preload - ANSWER ✔✔amount of blood and pressure in the ventricle
at the end of diastole. Increases due to increase of volume.
Afterload - ANSWER ✔✔the resistance that has to be exceeded for
the ventricle to eject the blood during systole. Increases due to HTN or
vasoconstriction.
cardiac output - ANSWER ✔✔heart rate x stroke volume
Lifespan considerations - ANSWER ✔✔-HR goes down in older
adults
-heart loses muscle tone which causes decrease of cardiac output
-BP will trend up with age
-Irregularities in infants and children in common