Bipolar leads are: a. Augmented leads b. Limb leads c. Chest leads (V leads) The

Question

Bipolar leads are: a. Augmented leads b. Limb leads c. Chest leads (V leads) The ability of a cardiac cell to respond to an external stimulus is called a. automaticity b. conductivity c. contractility d. excitability The relative refractory period corresponds to the time in the action potential when the cell a. san be stimulated by another impulse b. can be stimulated by a stronger than normal impulse c. an be stimulated by a weaker than normal impulse d. cannot be stimulated by another impulse The only normal conduction pathway between the atria and the ventricles is a. Bachmann's bundle b. the SA Node c. the AV Node The wave of depolarization travelling toward a positive electrode creates a a. negative deflection b. positive deflection c. biphasic deflection If each small block on the EKG paper is 04 sec, then between each dark line on paper there are 5 small blocks, this represents a. 20 sec b. 01 sec c. none of the above The horizontal axis on EKG paper represents a. duration (time) measured in seconds b. amplitude (voltage) measured in mV c. none of the above

Explanation / Answer

7. Bipolar leads are:

B. Limb leads

8. The ability of a cardiac cell to response to an external stimulus is called

D. Excitability

9. The relative refractory period corresponds to the time in the action potential when the cell

B. Can be stimulated by a stronger than normal impulse

10. The only normal conduction pathway between the Syria and ventricles is

C. The AV node

11. The wave of depolarisation travelling towards a positive electrode creates a

B. Positive deflection

12. If each small block on the EKG paper is .04 sec, then between each dark line on paper there are 5 small blocks, this represents

A. .20 sec

13. The horizontal axis on EKG paper represents

A. Duration ( time ) measured in seconds

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