Question | Answer |
Define electrocardiogram - | Printed record of the electrical activity of the heart |
Define electrocardigraph - | Machine that makes the recording |
What supplies the electrical power to the machine? | Power cable |
What voltage does the ECG machine operate at? | 110 - 120 Volts |
What size cycle outlet does the ECG machine operate at? | 60 cycle outlet |
What is suspended in a magnetic field and fluctuates when current passes through the feild? | Galvanometer String |
What is the name of the writing arm of the machine? | Stylus |
What two principles does the stylus work on? | 1. Under heat - 2. Pressure |
What carries currect from the patient to the machine? | Patient cable |
Where is the pt cable grounded? | On both ends |
What are the extensions called that pick up current from the pt and carry it to the pt cable? | Lead wires |
What is the minimum # used? | 4 limb & 1 chest |
What are the normal number of lead wires? | 4 limb & 6 chest |
What is used to select the lead required? | Lead selector |
What are the major positions for the lead selector? | I, II, III, AVR, AVF, AVL, V1 - V6 |
What controls how fast the paper is moving past the stylus? | Paper speed |
What are the most common paper speeds used? | 25 mm & 50 mm |
The ECG machine is standardized according to what? | Time & Voltage |
What size deflection would 1 mv of currect cause? | 10 mm |