Lab 3 Flashcards
(23 cards)
Diastolic pressure
Pressure when ventricles relax; usually 80hg
Systolic pressure
Pressure do to ventricular contraction;
Usually 120hg
Blood pressure
Force per area exerted on the vessel wall
Pulse
Expansion and recoil of elastic arteries
Sounds of korotkoff
Reflecting the blood pressures that the heart and major arteries are experiencing
Arrhythmia
Abnormal heart beat
Tachycardia
Heart beats too quickly. Over 100bpm
Bradycardia
Heart brats too slow. Less then 60bpm
Sphygmomanometer
Blood pressure cuff. Device for measuring blood pressure within artery
Ventricular systole
Ventricles contracting
Ventricular diastole
Ventricles are refilling
Cardiac output
Amount of blood pumped by each ventricle in one minute
CO= Heart Rate X Stroke Volume
Heart Rate
Number of heart beats per minute.
Average is 75bpm
Stroke volume
Amount of blood pumped by each ventricle with each heartbeat.
Avg is 70mL per beat
Stroke Volume represents
Difference btw end diastolic volume and end systolic volume.
SV= EDV - ESV
4 factors of blood pressure
Blood vessel diameter
Blood viscosity
Total blood vessel length
Peripheral resistance
P. Wave
Small deflection wave;
Represents atrial depolarization
QRS Complex
Ventricular depolarization
ST Segment
Time between the end of QRS complex and start of a new T wave.
Zero potential period btw depolarization and repolarization
PQ interval
In between P wave and QRS complex
Tunica Interna
Endothelium, lumen, valves (Veins only)
Tunica media
Smooth muscle
Elastic fibers in arteries making it thickest layer
Tunica externa
Collagen fibers
Thickest layer in veins
