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Cardio Info Exam 2

Anatomy Exam 2

QuestionAnswer
Pace-maker SA node
P - Wave atrial depolarization, atrial systole, atrial contraction
AV node holds impulse for 0.1 seconds so atria can drain
Purkinje Fibers QRS complex
T wave (Ventricular Diastole, ventricular repolarization)
QRS complex (Ventricular depolarization, ventricular systole, hidden atrial repolarization)
Passive Ventricular Filling: Blood flowing from atria to ventricle AV valves open (end diastolic volume, preload, and venous return)
End Diastolic Volume how much blood there is when ventricles are full
Preload degree of stretch ventricular myocardium has at the end of diastole
Venous Return blood pumped back to your heart
Isovolumetric Contraction AV Valves and SL valves both closed Need to build up pressure in ventricles to open semilunar valves Afterload*
Afterload Pressure must reach in order to eject blood out of the ventricles/open semilunar valves. Determined by BP
Rapid Ejection Both semilunar valves are now open, blood leaves ventricles (end systolic volume)
First heart sounds AV valves closing
End Systolic Volume amount of blood in ventricles after heart contracts
Cardiac output CO = HR x SV Amount of blood pumped per minute. About 5 L
Stroke volume amount of blood pumped per beat
Chronotropic affects speed HR
Inotropic affects strength of contraction, SV
positive chrono and inotropes epi and norepinephrine
negative chrono and inotropes Beta blockers
Between Atria shunt in fetal heart Foramen Ovale
Between Pulm Trunk and Aorta shunt in fetal heart Ductus Arteriosus
Left sided heart failure blood backflows into the lungs, pulmonary edema
Right sided heart failure blood backflows into the body, edema in the legs
Created by: jojojackson
 

 



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