Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
EBR EMS
EBR EMS Chapter 12 Definitions
| Question | Answer |
|---|---|
| angina pectoris | severe chest pain resulting when the myocardium is deprived of suffficient oxygen |
| arteriole | small branch of an artery |
| artery | vessel carrying blood away from the heart |
| AV valve | two valves that seperate the atrial chambers from the ventricles |
| atrium | chamber or cavity |
| AV bundle | fibers in the heart that relay a nerve impulse from the AV node to the ventricles; also known as the bundle of His |
| AV node | small mass of specialized cardiac muscle tissue; part of the conduction system of the heart |
| bicuspid valve (mitral valve) | one of the two AV valves that are located between the left atrium and ventricle |
| capillary | tiny vessels that connect arterioles and venules |
| cardiac output | volume of blood pumped by one ventricle per minute |
| cardiopulmonary resusitation | combined external cardiac massage and artificial respiration |
| central venous pressure | venous blood pressure within the right atrium that influences the pressure in the large pripheral veins |
| coronary artery | the first artery to branch off the aorta; supplies blood to the myocardium |
| coronary bypass surgery | surgery to relieve severely restricted coronary blood flow; veins are take from other parts of the body to bypass the partial blockage |
| coronary circulation | delivery of oxygen and removal of waste product from the myocardium |
| coronary sinus | area that recieves deoxygenated blood from the coronary veins and empties into the right atrium |
| coronary vein | |
| diastole | relaxation of the heart, interposed between its contractions; opposite of systole |
| diastolic pressure | blood pressure in arteries during diastole of heart |
| ductus arteriosus | connects the aorta and the pulmonary artery, allowing most blood to bypass the fetus' developing lungs |
| ductus venous | a continuation of the umbilical vein that shunts blood returning from the placenta past the fetus' developing liver directly into the inferior vena cava |
| ECG (electrocardiogram) | graphic record of the heart's action potentials |
| endocarditis | inflammation of the lining of the heart |
| endocardium | thin layer of very smooth tissue lining each chamber of the heart |
| epicardium | the inner layer of the pericardium that covers the surface of the heart; it is also called the visceral pericardium |
| foramen ovale | shunts blood from the right atrium directly into the left atrium, allowing most blood to bypass the baby's developing lungs |
| hepatic portal circulation | the route of blood flow through the liver |
| myocardial infarction | death of cardiac muscle cells resulting from inadequate blood supply as in coronary thrombosis |
| myocardium | muscle of the heart |
| P wave | deflection on an ECG that occurs with depolarization of the atria |
| pericarditis | when the pericardium becomes inflamed |
| pericardium | membrane that surrounds the heart |
| peripheral resistance | resistance to blood flow encountered in the peripheral arteries |
| pulmonary circulation | venous blood flow from the right atrium to the lung and returning to the left atrium |
| pulse | alternating expansion and recoil of the arterial walls produced by the alternate contraction and relaxation of the ventricles; travels as a wave away from the heart |
| Purkinje fibers | specialized cells located in the walls of the ventricles; relay nerve impulses from the AV node to the ventricles causing them to contract |
| QRS complex | deflection on an ECG that occurs as a result of depolarization of the ventricles |
| semilunar valve | valves located between the two ventricular chambers and the large arteries that carry blood away from the heart; valves found in the veins |
| sinoatrial node | the heart's pacemaker; where the impulse conduction of the heart normally starts; located in the wall of the right atrium near the opening of the superior vena cava |
| stroke volume | the amount of blood that is ejected from the ventricles of the heart with each beat |
| systemic circulation | blood flow from the left ventricle to all parts of the body and back to the right atrium |
| systole | contraction of the heart muscle |
| systolic pressure | force with which blood pushes against artery walls when ventricles contract |
| T wave | deflection on an electrocardiogram that occurs with repolarization of the ventricles |
| tricuspid valve | the valve located between the right atrium and ventricle |
| umbilical artery and vein | artery: two arteries carrying oxygen poor blood away from the developing fetus to the placentavein: carries oxygen rich blood from the placenta to the developing fetus |
| vasomotor mechanism | factors that control changes in the diameter of arterioles by changing the tension of smooth muscles in the vessel walls |
| vein | vessel carrying blood toward the heart |
| ventricle | small cavities |
| venule | small blood vessels that collect blood from the capillaries and join to form veins |
Created by:
hjkruse
Popular Paramedic/EMT sets