Cardiovascular System Flashcards
CV Organs
Heart, Arteries, Vein, Blood
Structures in the heart
4 Chambers (R-L Atrium, R-L Ventricles), Pericardium, Wall
Chambers of the heart
Made up of myocardium
R Atrium (deoxygenated blood enters via SVC)
R Ventricle
L Atrium
L Ventricle (oxygenated blood leaves via the aorta)
Valve between the R Atrium/R Ventricle
Tricuspid Valve
Valve between the L Atrium/L Ventricle
Mitral, or Bicuspid Valve
Walls of heart
Outer layer - Epicardium
Middle layer - Myocardium (contractile layer
Inner layer - Endocardium
Heart Rate
Normal for adult = 60-100 bpm
Tachycardia = >100 bpm at rest
Bradycardia = < 60 at rest
Heart rate measured at heart, pulse rate measured distally
Blood pressure
Normal = 120/80 mmHg Systolic = contraction of ventricles, highest pressure Diastolic = relaxation of ventricles, lowest pressure
Locations for taking a pulse
Temporal, Carotid, Brachial, Radial, Femoral, Popliteal (Posterior), Dorsalis Pedis (Top of Foot)
Cardiac Output
Stroke Volume
CO = Amount of blood pumped out of ventricle in one minute SV = Amount of blood pumped out of ventricle in one contraction CO = SV x HR
Electrical system of heart
SA Node, AV Node, Bundle of HIS, Purkinje fibers
SA Node = R Atrium near SVC, primary pacemaker
AV Node = Inferior wall of R Atrium close to tricuspid valve
3 sternal precautions
No pulling up in bed; roll to side in acute care; no driving for six weeks; no pushing, pulling or lifting greater than 10 lbs. for six weeks
Leading cause of stroke and heart disease
Hypertension, high arterial blood pressure
Atherosclerosis
Narrowing of vessel lumen (inside of vessel)
Thrombus
Stationary blood clot attached to vein or artery