EKG Flashcards
3 lead EKG
- Usually continuous monitoring
- 4 parts (limb leads)
- RA - White
- LA - Black
- RL - Green
- LL - Red
5 lead EKG (Holter monitor)
- R Sternum (white)
- L Sternum (black)
- R Lower thoracic (green)
- L Lower thoracic (red)
- Bottom right of sternum (Brown)
Skin prep for EKG
- Shave area for smoother application
- Clean with alcohol wipes
- Use exfoliating paper
12 lead EKG
•Regular 3 lead set up (all 4 limb leads)
•Precordial leads
-V1: 4th intercostal space, R of sternum
-V2: 4th intercostal space, L of sternum
-V4: 5th intercostal space, midvlavicular
-V3: Between V2 and V4
-V6: 5th intercostal space, midaxillary (line up at V4 level)
-V5: 5th intercostal space between V4 and V6
Einthoven triangle/law
An equilateral triangel used as a model of standard limb leads used to record EKG. The heart is said to be the center of the triangle.
Angina pectoris
Pain or discomfort in the chest
Stable angina
Occurs with exercise and is relieved with rest and meds (less than 20 mins)
Unstable angina
Occurs suddenly without warning (more than 20 mins)
Aorta
Largest artery in the body, carries oxygenated blood away from the heart
Apex
Lower pointed end of heart
Arrhythmia
An abnormal heart rhythm
Arteriosclerosis
A chronic disease characterized by the hardening and thickening of the arteries
Artifact
Electrical or magnetic interference that alters the EKG tracing
Asystole
Absense of any electrical activity of the heart
Atherosclerosis
Plaque build up on the inner lining of the blood vessels
AV node (atrioventricular node)
Consists of specialized tissue that is able to regulate impulses between atria and ventricles
Baseline
An electrically neutral area of an EKG
Bundle branch
Part of the conduction system responsible for triggering ventricular muscle contractions
Bundle of HIS
Part of conduction system responsible for conducting a stimulus to the septum and bundle branches
Cardiac arrest
The absense of cardiac activity
Coronary arteries
Arteries that supply oxygenated blood to the myocardium
Ectopic
Originating in the heart other than the SA node (sinoatrial node)
EKG (electrocardiograph)
A graphic representation of the electrical activity of the heart
Endocardium
Innermost layer of the heart
Epicardium
Outermost layer of the heart
Myocardium
Middle muscular layer of the heart
IVC (inferior vena cava)
Largest vein in the body: returns deoxygenated blood to the heart
Intercostal
Between ribs
Ischemia
Insufficient oxygen of tissue
Mediastinum
1 of 3 compartments in chest that encapsulates the heart and great vessels
Midaxillary
Imaginary line through axillay region, separates front and back of body
Midclavicular
Imaginary line through middle of clavicle
MI (myocardinal infarction)
Death of the heart muscle
Pacemaker
A device that provides artificial stimulation to the heart muscle to trigger contraction
PQRST waves
The standard waveform found on an EKG tracing. Each wave corresponds to a specific event in the cardiac cycle
Purkinje fibers
Fibers that conduct electrical impulses through the right and left ventricles
Sinoatrial node (SA node)
Pacemaker of the heart; in right atrium; where the heartbeat originates
P wave
Atrial depolarization
QRS waves
Ventricular depolarization
T waves
Ventricular repolarization
AV node
40-60 BPM
“The gatekeeper”
SA node
60-100 BPM
“The pacemaker”
Depolarization
Contraction
Repolarization
Relaxing
Electrocardiography
Procedure
Electrocardiograph
Instrument
Electrocardiogram
Graphical representation
Holter monitor
Small portable EKG monitor worn for 24 hrs or more
Lub dub
- Lub - 1st sound (closing of tricuspud and bicuspid valves)
- Dub - 2nd sound (closing of aortic and pulmonary valves)
Other names for Coronary heart disease (CDH)
- Artherosclerosis
- Heart disease
- Ischemic heart disease
- Hardening of the arteries
Heart attack
Occurs if the flow of oxygen-rich blood to a section of heart muscle is cut off
What causes coronary heart disease
- Smoking
- High blood pressure
- Inflammation of blood vessels
Major risk factors
- Unhealthy blood cholesterol levels
- Insulin resistance
- obesity
- Lack of physical activity