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Heart Location, size, and position located in mediastinum, 2/3 of mass to the Left, 1/3 to the right, apex on the diaphragm.
CPR Cardiopulmonary Resuscitation, rhythmic compression of the heart.
Heart Chambers Two upper chambers, two lower chambers
Atria upper chambers
Ventricles lower chambers
Myocardium cardiac muscle tissue
Endocardium smooth lining of heart chambers
Endocarditis inflammation of the lining of heart chamber
Pericardium covering sac
Visceral pericardium or epicardium inner layer
Parietal pericardium outer layer
Systole contraction
Diastole relaxation
Heart Valves keep blood flowing through the heart and prevent backflow
Atriventricular Valves AV valves, tricuspid and bicuspid valves, located between the atria and ventricles
Tricuspid opening at the right atrium into the right ventricle
Bicuspid (mitral) at the opening of the left atrium into the left ventricle
Semilunar valves Pulmonary valve and Aortic valve
Pulmonary valve beginning of the pulmonary artery
Aortic valve beginning of the aorta
"Lup" sound first sound (lub) cuased by the vibration and closer of the AV valve during contraction of the ventricles (QRS complex)
"dup" sound second sound caused by closure of the semilunar valves (pulmonary and aortic valves) during relaxation of the ventricles
The heart acts as... two separate pumps
Sequence of blood flow: Inferior vena cava, superior vena cava> R atrium> R Ventricle> pulmonary valve> pulmonary artery> lung> arterioles> capillaries> venules> pulmonary vein> L atrium> L ventricle> aortic valve> aorta >body.
Heart blood supply: coronary circulation
Coronary circulation: Coronary vein> Coronary sinus> R artrium (when the semilunar valves closed)> Normal sequence of blood flow> coronary artery (branching off from the aorta)> heart muscle!
MI myocardial infarction, heart attack, heart tisse death
Angina Pectoris chest pain caused by inadequate O2 to the heart
Coronary bypass surgery veins from other body parts used to bypass clot in the coronary arteries
Ventricular Diastole heart muscle is supplied with oxygenated blood
Cardia cycle one single heartbeat, last 0.8 seconds
Stroke volume volume of blood pumped out by one ventricle each beat
Cardiac Output amount of blood that one ventricle can pump each minute, average is 5L per min.
Conduction system of the heart consists of SA node, AV node, bundle of His, Purkinje fibers
SA (sinoatrial node) the pacemaker, located in the wall of R atrium. fires electrical impulse
AV node located in the R atrium (slightly linger the electricle
AV bundle (bundle of His) located in the septum of the ventricle
Purkinje fibers located in the walls of the ventricles (signal the ventricles to contract)
ECG Electrocardiogram, visible tracing of electrical signals
P wave associated with depolarization of the atria
QRS complex associated with depolarization of the ventricles
T wave associated with repolarization of the ventricles
Tunica intima inner layer of endothelial cells (vein has valves)
Tunica media smooth muscle with some elastic tissue, thick in arteries, important in blood pressure regulation (thin in veins)
Tunica externa thin layer of fibrous elastic connective tissue (heavy layer in vein)
Systemic circulation carries blood throughout the body
Pulmonary circulation carries blood to and from lung
Hepatic portal circulation unique blood route through the liver, has two capillary beds, assist with hemostasis of blood glucose level
Fetal circulation circulation before birth, modificat ion required for fetus to efficiently secure oxygen and nutrients from the maternal blood
BP pus or force of the blood in the vessel, highest in the arteries, lowest in the veins
Factors influence BP Blood volume, strength of ventricular contractions, blood viscosity, resistance to blood flow
Central venous pressure venous blood pressure within right atrium
Pulse alternate expansion and recoil of the blood vessel wall
Created by: sakal