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SPC APII Lect Cardio

Pericardium Double-walled triple-layered sac, adheres to heart's outer surface & confines heart to its position
Myocardium Contracting muscle layer
Endocardium Lines chambers, covers valves
What is the function of the Inferior Vena Cava? Returns deO2 blood from lower body to the Right Atrium
What is the function of the Superior Vena Cava? Returns deO2 blood from upper body to Right Atrium
What is the function of the Pulmonary trunk & arteries? Sends deO2 blood to lungs from Right Ventricle
What is the function of the Pulmonary veins? Sends O2 blood to Left Atrium from lungs
What is the function of the Coronary Sinus? Sends deO2 blood to Right Atrium from heart
What is the function of the Aorta? Sends O2 blood to systemic circulation
How do Atria & Ventricles differ in function? Atria RECEIVES blood from systemic circ. & lungs. Ventricles SEND blood to systemic circ. & lungs.
How are arteries & veins different? Arteries take O2 AWAY from heart(except pulmonary & umbilical arteries). Veins bring deO2 blood to the heart(except pulmonary & umbilical veins).
What are the names of all of the Semilunar heart valves? Pulmonary SL & Aortic SL
What are the names of all of the Atrioventricular heart valves? Right AV valve = Tricuspid, Left AV valve = Bicuspid(mitral)
What is the Cardiac Cycle? A complete heart beat. 2 atria contract while 2 ventricles relax < 2 ventricles contract while 2 atria relax < heart relaxes/all 4 chambers relax.
Explain the P, QRS, & T waves. P: atrial depol. QRS: vent. depol. T: vent. repol.
What is the position of each heart valve during atrial & ventricular systole? Atrial Systole: AV valves open & SL valves closed. Ventricular Systole: AV valves closed & SL valves open.
What does "Lubb" & "Dupp" represent? Lubb: 1st sound (S1) Closure of AV Valves & Dupp: 2nd sound (S2) Closure of SL Valves
What is the relationship between Cardiac Output, Stroke Volume, & Heart Rate? CO = SV x HR
What are the Primary, Secondary, & Tertiary factors affecting HR? Primary: Normal demands(exercise, etc), abnormal demands(congenital cond. or tissue damage) Secondary: Autonomic NS, hormones, Tertiary: Other factors(temp, pain, emotions, age, gender, fever, etc)
What is the difference between semilunar & atrioventricular heart valves? Semilunar: consists ONLY of cusps, each has 3 cusps. Prevent backflow of blood to ventricles. Atrioventricular: consists of cusps, chordae tendinae, and papillary muscles. Prevent backflow of blood to atria.
What is Systole? contraction of the atrioles & ventricles
What is Diastole? relaxation of the atrioles & ventricles
What is Isovolumetric Contraction & Relaxation? For 0.05sec all 4 valves are closed - this occurs twice in the cardiac cycle
Duration of one heart beat? 75 beats/min; 0.8sec (0.4sec all 4 chambers in diatole, 0.1sec atria contact, 0.3 venticles contract)
Created by: vgflgirl



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