Cardiovascular System
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1 Cardiovascular System Heart: hollow muscular organ, pumps blood full of nutrients throughout the body Arteries: carry blood away from the heart Capillaries: smaller vessels, microscopic, exchange of nutrients Veins: carry blood back to the heart Venules: connect capillaries to veins
2 Cardiovascular System Pulse: the surge of blood that the heart is pumping out to your body Venous Blood: deoxygenated blood, that is going back to the heart Arterial Blood: Oxygenated blood, leaving the heart and going out to the body
3 Capillaries Microscopic vessels, join the arterial and venous system. Thin walls Easily exchange water, gases, molecules, metabolites, and waste
4 Vascular System Valves: small structures within veins that prevent the backflow of blood
5 Heart Pericardium: sac that encloses the heart Tissue Layers: Endocardium, Myocardium, epicardium
6 Heart Four Chambers: Right Atrium, Left Atrium, Right Ventricle, Left Ventricle
7 Blood flow through the Heart Superior Vena Cava and Inferior Vena Cava bring deoxygenated blood back to the heart pouring it into the Right Atrium
8 Blood flow through the Heart From the Right Atrium blood passes through the Tricuspid Valve and into the Right Ventricle
9 Blood flow through the Heart From the Right Ventricle blood is pumped through the Pulmonic Valve into the Left Pulmonary Artery and Right Pulmonary Artery and travels into the lungs
10 Blood in the Lungs Pulmonary Artery branches into millions of capillaries lying close to Alveolus and carbon dioxide in the blood is exchanged for oxygen
11 Lungs to the Heart Oxygen rich blood leaves the lungs in the Right Pulmonary Vein and Left Pulmonary Vein, these vessels pour the blood into the Left Atrium
12 Blood flow through the Heart From the Left Atrium blood passes through the Mitral (Bicuspid) Valve and into the Left Ventricle
13 Blood flow away from the Heart From the Left Ventricle blood enters into the Aorta through the Aortic Valve and out into the body
14 Aortic Arch 3 main branches: Brachiocephalic trunk, Left common carotid artery, Left subclavian artery
15 Important Structures of the Heart Interventricular Septum divides the ventricles Apex lowest superficial part of the heart
16 New Medical Terms Lumen Aort/o Arteri/o Atri/o Cardi/o My/o Ven/o Sept/o Ventricul/o Arteriol/o Peri-
17 Medical Word Elements Angi/o Aneurysm Ather/o Electr/o Embol/o Scler/o Thrombo/o -stenosis Endo- Brady- Tachy- Trans-
18 Circulation of the Heart Left Main Coronary Artery Circumflex Coronary Artery Left Anterior Descending Coronary Artery Right Coronary Artery
19 How our Heart Beats Cunduction tissue: found in the heart, spreads contraction impulses Sinoatrial (SA) node Atrioventricular (AV) node Bundle of His (AV bundle) Purkinje fibers
20 How the Heart Beats Sinoatrial (SA) node: the pacemaker of the heart, without being stimulated by external nerves has the ability to initiate and propagate each heartbeat. Heart Rate: Can be altered by the Autonomic Nervous System
21 How the Heart Beats Each impulse discharged by the SA node is transmitted to the Atrioventricular (AV) node this causes the atria to contract From the AV node, impulses are send to the Bundle of His (AV bundle) which relays the impulse to the Purkinje fibers this causes the ventricles to contract
22 How we measure it Electrocardiograph: an instrument that records electrical impulses P,Q,R,S, and T waves P: Contraction of the atria QRS: Contraction of the ventricles T: recovery of the ventricles
23 P, QRS, T
24 Blood Pressure Measures the force of the blood against the arterial walls during two phases Systole: When the blood is forced out of the heart Diastole: relaxation phase when the ventricles are filling with blood 120/80 mmhg
25 Blood Pressure Hypertension: consistently elevated blood pressure Hypotension: decreased blood pressure
26 Vascular System Vasoconstriction: Lumen of the vessel contracts, resulting in decreased blood flow Vasodilation: Lumen of the vessel relaxes, resulting in increased blood flow
27 Cardiac Disorders Common Sx Angina: Chest pain Dys/pnea: Difficulties breathing Arrhythmias: Cardiac irregularities Syncope: Loss of consciousness
28 Cardiac Specialties Cardi/o/logy: The medical specialty concerned with disorders of the cardiovascular system Cardi/o/logist: A physician who treats these disorders
29 Arteriosclerosis Arteri Scler -Osis Rule?
30 Arteriosclerosis Hardening of the arterial walls that causes them to become thickened and brittle Atheroma: Cholesterol, lipids, cellular debris making up a plaquelike substance Tunica Intima: artheroma builds up on the inside lining
31 Treatment for Arteriosclerosis Endarterectomy: Surgeon opens the site and removes the plaque Carotid, peripheral, renal, and aortic arterial disease
32 Other Risks of Arteriosclerosis Thrombus: formation of a blood clot Embolus: when the clot has dislodged and is traveling through the vascular system
33 Other Risks of Arteriosclerosis Emboli in the arterial circulation can lead to infarct: tissue death or may cause aneurysm: weakened vessel wall that begins to bulge
34 3 Types of Aneurysm
35 Coronary Artery Disease When the coronary arteries do not deliver an adequate supply of blood to the myocardium Caused by arteriosclerosis Leads to ischemia Can lead to cell death infarction (MI, Myocardial Infarction)
36 Sx of MI Angina Diaphoresis: Pallor: Dyspnea: Tachycardia: Bradycardia
37 Treatments for Coronary Artery Percutaneous Transluminal Coronary Angioplasty (PTCA) Disease Coronary Artery Bypass Graft (CABG)
38 Endocarditis Inflammation of the inner lining of the heart and its valves Thrombi formation or infective May cause: Regurgitation: Backflow of the blood Embolus Stenosis: narrowing of the valves Insufficiency: valves don t close properly
39 Varicose Veins Enlarged, twisted, superficial veins, resulting from incompetent valves that fail to prevent backflow of blood
40 Vericose Veins Varices: occurring in the esophagus Hemorrhoids: Occurring in the rectum Teleangiectases: spider veins and fine blue starburst, occurring in the reticular veins
41 Cardiac Arrest The heart has stopped, there is no observable myocardial activity
42 Arrhythmia Inability of the heart to maintain a normal sinus rhythm also called dysrhythmia
43 Arrhythmia
44 Deep Vein Thrombosis (DVT) Blood clot that forms in the deep veins of the body, primary the legs
45 Heart Failure (HF) Failure of the heart to supply an adequate amount of blood to tissues and organs
46 Hypertension (HTN) Common disorder characterized by elevated blood pressure persistently exceeding 140mmHg Systolic or 90 mmhg Diastolic
47 Ischemia Local and temporary deficiency of blood supply due to circulatory obstruction
48 Mitral Valve Prolapse (MVP) The leaflets of the mitral valve prolapse into the left atrium during systole causing a murmur on auscultation
49 Heart Auscultation
50 Palpitation Sensation that the heart is not beating normally, thumping, fluttering, skipped beats, pounding in the chest
51 Perfusion Circulation of blood through tissues or the passage of fluids through vessels of an organ
52 Cardiac Catheterization (CC) Passage of a catheter into the heart through a vein or artery to provide a comprehensive evaluation of the heart
53 Electrocardiogram (ECG, EKG) Graphic line recording that shows the spread of electrical excitation of different parts of the heart
54 Cardiac Blood Work Cardiac Enzyme Studies Blood test that measures troponin T, troponin I, and creatinine kinase Lipid Panel Series of tests used to assess risk factors of ischemic heart disease
55 Echocardiography (ECHO) Noninvasive diagnostic method that uses ultrasound to visualize internal cardiac structures and produce images of the heart
56 Cardioversion Procedure to restore normal rhythm of the heart by applying a controlled electrical shock to the exterior of the chest
57 Ligation & Stripping Tying a varicose Vein (ligation) followed by removal (stripping) of the affected segment
58 Fetal Blood Circulation Placenta: An organ developed specifically for each Fetus bringing nutrients and oxygen to the baby and removing waste.
59 Fetal Circulation Umbilical Cord: contains 2 arteries & 1 vein Umbilical Arteries: carry deoxygenated blood to the placenta Umbilical Veins: carry oxygenated blood to the fetus
60 Fetal Circulation Oxygenated blood moves from the Umbilical cord, into the inferior Vena Cava through the ductus venosus and then into the Right Atrium
61 Fetal Circulation From the Right Atrium some blood will move into the Right Ventricle but most of it will move there the Foramen Ovale the small opening between the atrium
62 Fetal Circulation From the Left Atrium blood moves through the mitral valve into the Left Ventricle, then through the aortic valve into the aorta
63 Fetal Circulation Blood that does make it into the Pulmonary arteries gets pushed through the Ductus Arteriosus and into the Aorta
64 Fetal Circulation
65 Newborn Heart Conditions Patent Ductus Arteriosus: Failure of the DA to close allowing blood to flow from the pulmonary artery to the aorta
66 Tetralogy of Fallot
67 Cardiac Blood Flow
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