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Basic Arrhythmia
Waves & Measurment - Chpt.2
| Question | Answer |
|---|---|
| Electrical patterns of the heart can be detected from the surface of the skin by | Attaching an electrode and connecting it to an electrocardiograph |
| An abnormal heart rhythm is called an | Arrhythmia or Dysrhythmia |
| Electrocardiography | The study of arrhythmia or dysrhythmia |
| EKG (ECG) refers to an | Electrocardiograph (EKG) machine or record |
| Electrocardiograph will display electrical patterns of the heart on a | monitor or graph paper |
| Electrical activity is displayed best if you can assure | good contact between the skin and electrode |
| Good contact between the skin and electrode can be achieved by | 1.Abrading the skin w/alcohol pad 2.Removing obstacles (dirt/hair) |
| Morphology | The study of shapes |
| The writing point on an EKG is an | Atylus |
| When the EKG is turned on (but not yet connected to the patient) it will produce a straight line called an | isoelectric line |
| An upright wave on an EKG is called | A positive |
| A downward wave onan EKG is called | A negative |
| Electricity flowing toward 'POSITIVE' electrode produce | an 'UPRIGHT' pattern |
| Electricity flowing toward 'NEGATIVE' electrode produce | an 'INVERTED' pattern |
| Different electrical views of the heart can be seen by | 1.Rearranging the electrode 2.Diverting the direction of the electrical impulse by turning a knob on the electrocardiograph |
| Each electrical view is called a | Lead |
| The most common lead used for cardiac monitoring is | Lead II |
| Vertical lines | on the EKC/ECG graph paper represent | Time |
| Horizontal lines __ on the EKG/ECG graph paper represent | Voltage / amplitude |
| Each small square on the EKG/ECG graph paper represents | 0.04 sec |
| Each dark 'block' of squares on the EKG/ECG graph paper represent | 0.20 sec = (0.04x5sq) |
| Every (3) three seconds on the EKG/ECG graph paper is represented by a | TIC mark at the top of the graph paper |
| A cardiac cycle is made up of a | PQRST |
| The first wave usually seen on a cardiac cycle is the | P wave |
| P wave represents | Atrial depolarization AKA Atrial discharge state |
| The second wave usually seen on a cardiac cycle is the | QRS Complex |
| QRS complex represents | Ventricular depolarization AKA Ventricular discharge state |
| A normal QRS complex is how long? | 0.12 sec or less (less then 3 small squares) |
| The last wave usually seen on a cardiac cycle is the | T wave |
| T wave represents | Ventricular REpolarization AKA ventricular recovery time |
| The PRI (PR interval) begins where the | P wave leaves the 'isoelectric line' and ends where the QRS complex begins |
| A normal PRI - PR interval) is how long? | 0.12 - 0.20 seconds (3-5 small squares) |
| Electrical interference sometimes seen on the EKG display is called | Artifact |
| Artifact can be caused by | 1.Muscle tremors 2.Patient movement 3.Loose electrodes 4.60 cycle interference |
| 60 cycle interference can be caused by | Electrical interference from other electrical machinery such as cellular phones, electric shavers, radio, floor buffer, video games, i-pods, etc |
Created by:
adrouillard
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