Med Surg-Quiz 11 Flashcards
RA & RV (Right Atrium, Right Ventricle)
tricuspid valve
RV & Pulmonary artery
pulmonary
LA & LV
mitral (Bicuspid)
LV & aorta
aortic (semilunar)
sinoatrial node = “pacemaker”
Located in the right atrium.
SA node
Path of bloodflow
Superior & Inferior Vena Cava, RA, Tricuspid Valve, RV, Pulmonary Valve, Pulmonary Trunk, Pulmonary Arteries, Lungs, Pulmonary Veins, LA, Biscupid Valve, LV, Aortic Valve, Aorta
contraction phase
Systole
filling phase
Diastole
“lub”- closure of bicuspid and tricuspid valves; beginning of systole
S1
“dub”- closure of aortic and pulmonary valves; end of systole
S2
abnormal ventricular “gallop”. Heard after S2 (heart murmur)
S3
abnormal atrial “gallop”. Heard before S1 (heart murmur)
S4
amount of contractions per minute.
Heart Rate
amount of blood ejected from ventricle with each contraction.
Stroke Volume
amount of blood (L) that is ejected from the ventricles per minute; CO= HR x SV. Normal is 4-6 L/min.
Cardiac Output
Percentage of total blood volume actually ejected from the ventricle. Never 100%. Always some reserved. EF = SV ÷ LVEDV (left ventricle end diastolic volume). Normal rate of 55-75%. Describes efficiency and strength of heart contractility.
Ejection Fraction
average pressure in the arteries over time. Normal is >60 mmHg. (Systolic + twice diastolic, then divide by 3.)
Mean Arterial Pressure
decrease in BP upon change in position from supine to sit to stand. Clinical signs: patient will report light-headedness or faintness upon head elevation. Can be managed with meds, TED hose, abdominal binder, circulation exercises
Orthostatic Hypotension
NORMAL: ≤ 119/79, Pre HTN= 120-130/80-89, Stage 1= 130-140/90-100, Stage 2= 140-160/100-110, Stage 3 >160/>110
Hypertension- (HTN)
build up of plaque inside the lumen of the arteries.
Atherosclerosis
RV failure- causes cor pulmonale; heart failure from increased arterial pressure in pulmonary artery; from COPD.
cor pulmonale