Anatomy of the Heart
Top/Bottom of the Heart
Base/Apex
A negatively charged ‘resting’ cardiac cell
Polarized
The recording the heart’s electrical impulses
Electrocardiography
Artifact is
unwanted interference
Three layers of the heart
Epicardium, Myocardium, Endocardium
How many large and how many small blocks in 1 minute
300 large
1500 small
Bipolar leads require
Both a positive and a negative pole
Baseline Sway cause and fix
breathing pattern or lotion/sweat, relax patient and alcohol wipes
Chambers of the Heart
Right Atrium, Left Atrium, Right Ventricle, Left Ventricle
1 large block equals how many small blocks
25 small blocks
Einthoven’s Law
Lead I+ Lead II = Lead III
Broken Recording cause and fix
Frayed/broken wires, repair them
Valves of the Heart
Tricuspid, Pulmonic, Mitral, Aortic
Inherent Pacemakers of the Heart/Their Rates
SA Node: 60-100bpm
AV Node: 40-60bpm
Ventricle: 20-40bpm
Telemetry is
Continuous monitoring
Somatic Tremors cause and fix
Body movement, relax patient
Location of the Heart (4 things)
Between the lungs, above the diaphragm, behind the sternum, in front of the spine.
Normal PR and QRS Intervals
PR: .12-.20sec or 120-200ms
QRS: .06-.12sec or 60-120ms
An impulse traveling perpendicularly to the positive electrode will write
An isoelectric complex
A/C Interference cause and fix
Electrical devices, remove source