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MAP126
Clinical Applications Week 2 Terms
| Term | Definition |
|---|---|
| ECG / EKG | Electrocardiogram |
| SA node | Sinoatrial Node |
| AC interference | Artifact on an ECG tracing caused by electrical interference example/cell phone |
| P wave | represents atrial depolarization |
| PR interval | represents the time it takes for the electrical impulse to travel from the SA node to the AV node. Normal range is 0.12 to 0.20 seconds |
| QRS | representative of ventricular depolarization normal range for a QRS complex is 0.06-0.10 sec |
| QT interval | the time from the beginning of the QRS complex, representing ventricular depolarization, to the end of the T wave normal range 0.4-0.44 sec |
| T wave | represents ventricular repolarization |
| Artifact | Anything artificially produced on an ECG |
| Arrhythmia | Abnormal Rhythm of heart beat |
| Asystole | Absence of heart beat (Cardiac arrest) |
| Atrial Tachycardia | rapid heart rate, causing the P wave to be unidentifiable or hidden in the previous T wave |
| Baseline | Initial measurement for future comparing |
| Bradycardia | Slow heart rate, less than 60 bpm |
| Bundle of His | part of the electrical system of the heart, it transmits impulses from the AV node to the ventricles of the heart |
| Diastole | Relaxation of the heart |
| Precordial | Pertaining to the precordium, refers to the chest leads placed on the patient for ECG testing |
| Polarization | cardiac cells in a resting, negatively charged state |
| Purkinje fibers | networks of fibers that receive conductive signals originating at the AV node and simultaneously activate the left and right ventricles by directly stimulating the ventricular myocardium |
| Sinus Rhythm | Any cardiac rhythm in which depolarization of the cardiac muscle begins at the sinus node |
| Normal sinus rhythm | regular rate (60-100bpm) and rhythm seen on the ECG |
| Somatic Tremor | Interference/artifact throughout the ECG tracing, often caused by patient movement or shivering |
| Systole | The contraction of the heart |
| Tachycardia | Fast heart rate greater than 100 bpm |
| Wandering baseline | artifact on an ECG commonly caused by loose electrodes |