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MED239 Chapter 5-6
| Question | Answer |
|---|---|
| electrical impulses that originate in the atria and initiate an early impulse that interrupts the regular rhythm. | PACs |
| electrical impulse(s) that come from outside the normal pacemaker site or electrical condition pathway | Ectopic |
| 60 to 100, depending on the frequency of the PAC. | premature atrial complexes Rate |
| within normal limits of .12 to .2 second. | PR interval with premature atrial complexes measures |
| premature complexes occur in a rhythm, they interrupt the underlying rhythm | irregular Rhythm |
| characteristic of the wandering atrial pacemaker rhythm | The changing P wave configuration with at least three variations in one lead and the possibility of irregular rhythm |
| normal finding in children, older adults, and well-conditioned athletes and does not usually cause clinical signs and symptoms. | Wandering atrial pacemaker |
| Multifocal atrial tachycardia (MAT) has | P wave that changes from beat to beat. |
| MAT has a heart rate | between 101 and 150 beats per minute |
| Atrial flutter has | sawtooth atrial pattern between the QRS complexes. |
| Atrial flutter occurs | when a rapid impulse originates in the atrial tissue |
| Automaticity | the ability to initiate an electrical current. |
| Morphology | Overall form and shape |
| J point | A point on the QRS complex |
| Cardiac output | The volume of blood the heart pumps each minute |
| Stroke volume | The volume of blood ejected by one or more ventricles with each contraction |
| Vagal tone | A condition in which tension on the vagus nerve causes variation in the heart rate |
| Hypotension | A lower than normal blood pressure |
| Ischemia | Occurs when there is a sudden loss or reduction in blood supply to a region of the heart tissue |
| Palpitations | Fast heartbeat sensation felt by the patient |
| Syncope | Loss of consciousness |
| Where does the electrical current start in the heart | SA node |
| sinus arrest is sometimes referred to | Sinus pause |
| medical assistant will observe what during a sinus arrest. | PQRSTs |
| pause caused by the SA node | Sinus exit block |
| Hypotension | A lower than normal blood pressure |
| Ischemia | Occurs when there is a sudden loss or reduction in blood supply to a region of the heart tissue |
| Palpitations | Fast heartbeat sensation felt by the patient |
| Syncope | Loss of consciousness |
| Where does the electrical current start in the heart | SA node |
| sinus arrest is sometimes referred to | Sinus pause |
| medical assistant will observe what during a sinus arrest. | PQRSTs |
| pause caused by the SA node | Sinus exit block |
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