BIO 112L EKG
PaceMaker of the Heart
Sinoatrial Node
slow heart rate
Brachycardia
Fast Heart Rate
TachyCardia
Located on lower floor of right atrium
Atrioventricular Node
Passes into Innterventricular Septum
Atrioventicular Bundle
Divide into Fine Purkinge Fibres
Bundle Branches
Distribute Electrical Impulses to Cardiolytes
Purkinge Fibres
Listening to internal sounds of the body
Ausculation
Used to amplify sounds to an audible level
Stethoscope
First heart sounds caused by closing of AV VALVES
Lubb
Second sound of the heart caused by closing of SL Valves
Dubb
Flat Metal Disk places against a person's skin to listen to each heart valve
Bell
Unusual Heart Sound is called a
Murmur
Average Blood Pressure IS
120/80mmhg
Blood Pressure is Measured using an Inflatable Cuff Called
Sphygmomanometer
Blood spurts through the artery and the turbulent flow makes sounds called that are audible through a stethoscope
Korotkoff's
The sound fades when the cuff pressure matches __ of the artery
Diastolic Pressure
Heart rate is usually determined by measuring the ____ in an area
Pulse or Pressure Wave
This Change in Vessel Diameter is felt as a Throb - A Pulse at Various
Pressure Points
Recodring of the impulses is called
EKG OR ECG
The basic components of an ECG are straight base lines known as
Isoelectric Line
During ___ Positively Charged Sodium Ions Enter A Cell
Depolarization
To return to the negative condition the membrane
Repolarizes
The ___ Of an ECG Occurs as the Atria Depolarize for Contraction
P Wave
The P wave is Followed by a Large Spike called the
Q-R-S Complex
The ___ Results from Ventricular Repolarization
T-Wave
Which occurs between the start of the P wave and the start of the Q-R-S Complex, is the time for the impulse to travel from the SA node to the Ventricular Muscle
P-R Interval
Is the cycle of Ventricular depolarization and repolarization
Q-T interval
A ____ on the ECG is the baseline recording between any two waves
Segment
The ____ represents the time for an impulse to travel from the AV node to the Ventricles
P-R Segment
The ____ Measures the delay between Ventricular Depolarization and Repolarization
S-T Segment.
Irregularities in the Heartbeat are Called
Arrhythmias