Week 12 - Cardiovascular System Flashcards
Aorta
largest artery in the body
Angiogram
xray of blood/lymph vessels
Aortic stenosis
narrowing of the valve in the large blood vessel branching off the heart (aorta)
Angioplasty
surgical repair or unblocking of a blood vessel; esp. coronary artery
Anoxia
absence of oxygen
Artery
largest type of blood vessel; carries blood away from the heart to all parts of the body
Arrhythmia
condition in which the heart beats with an irregular or abnormal rhythm
Atheroma
collections of plaque that protrude into the lumen of an artery, weakening the muscle lining
Atrioventricular node
AV node; specialized tissue in the wall between the atria
Atrioventricular bundle
bundle of His; specialized muscle fibers connecting the atria with the ventricles and transmitting electrical impulses between them
Atrium
one of two upper chambers of the heart
Bradycardia
slower than normal heartbeat; <60 bpm
Capillary
smallest blood vessel
Carbon dioxide
CO2; gas (waste) released by body cells, transported via veins to the hear and then to the lungs for exhalation
Coronary heart disease
plaque builds up inside the coronary arteries causing artherosclerosis
Cyanosis
bluish discoloration of the skin indicates diminished oxygen content of the blood
Diastole
relaxation phase of the heartbeat
Endocardium
inner lining of the heart
Electrocardiogram
ECG; record of the electricity flowing through the heart; P, QRS, T
Hypoxia
inadequate oxygen in tissues
Mitral valve
valve between left atrium and left ventricle; bicuspid valve
Myocardium
muscular middle layer of the heart
Normal sinus rhythm
heart rhythm originating in the sinoatrial node with a rate in patients at rest of 60 - 100 bpm
Pericardium
double-layered membrane surrounding the heart
Pulmonary circulation
flow of blood from the heart to the lungs and back to the heart
Pulse
beat of the heart as felt through the walls of the arteries
Pulmonary vein
one of two pairs of vessels carrying oxygenated blood from the lungs to the left atrium of the heart
Pulmonary valve
valve positioned between the right ventricle and the pulmonary artery
Sinoatrial node
SA node; pacemaker of the heart
Systole
contraction phase of the heart beat
Tachycardia
faster than normal heart beat; >100 bpm
Tricuspid valve
located between the right atrium and the right ventricle; it has three leaflets or cusps
Vasoconstriction
constriction of blood vessels, which increases blood pressure
Vasodilation
dilation of blood vessels, which decreases blood pressure
Vena cava
largest vein in the body; superior and inferior venae cavae return blood to the right atrium of the heart
Ventricle
one of tow lower chamber of the heart
Tetralogy of Fallot
congenital malformation involving four distinct heart defects; pulmonary artery stenosis, ventricular septal defect, shift of the aorta to the right, hypertrophy of the right ventricle
Sphygmomanometer
instrument to measure blood pressure
Stethoscope
instrument for listening to the action of someones heart or breathing
Thrombolysis
dissolution of blood clot
Vascular
pertaining to vessel(s), esp those that carry blood
Cardiomegaly
abnormal enlargement of the heart
Arterial anastomosis
surgical connection of arteries
Arteriole
small artery
Atherectomy
sx for removing atherosclerosis from blood vessels within the body
Cardiomyopathy
chronic disease of the heart muscle
Hypercholesterolemia
excess of cholesterol in the bloodstream
Endothelium
innermost lining of blood vessels
Septum
partition or wall dividing a cavity
Claudication
Pain, tension, and weakness in a leg after walking has begun, but absence of pain at rest