Chapter 10 Flashcards
epicardium
- outer layer of connective tissue
- coronary arteries
myocardium
middle layer
- muscular
- thickest layer
- workhorse of the heart
endocardium
- innermost layer
- smooth membrane
- heart valves
atrioventricular or AV valves
- flap-like valves between atria and ventricles
- prevents back flow of blood into atria when ventricles contract
pulmonary circulation
-oxygen-poor blood enter RA, then goes through tricuspid valve to the RV, then to the pulmonary artery
systematic circulation
-freshly oxygenated blood leaves lungs through pulmonary veins, blood enters LA, then goes through mitral valve to the LV, then to the aorta
angina pectoris
-chest pain from temporary reduction in blood flow to cardiac muscles despite increased oxygen demand
systole
-contraction period
diastole
relaxation period
atrial fibrillation AF
- can live with
- atria quiver versus contracting normally
ventricular fibrillation VF
- can not live with
- ventricles are unable to contract normally
- can be caused from cocaine use
Rheumatic fever
- commonly encountered in children
- not a bacterial infection but an immunologic reaction that develops weeks after initial streptococcal infection
- scarring of heart
arterioclerosis
-narrowing of arteries from lipid deposits by diffusion from bloodstream
myocardial infarction
- necrosis of heart muscle from sever ischemia
- ECG, EKG, or enzyme test
- Troponin T and troponin 1
“bad cholesterol”
- low density lipoprotein
- want low
