71210 Bioelectromagnetism - Exercises Autumn 2004

Cardiac Defibrillation

1. Defibrillation is used in all following cases except..
   1. cardiac arrest
   2. hypovoleamic shock
   3. ventricular tachycardia
   4. ventricular fibrillation
2. What is reentry?
   1. Occluded vessels cause circulation to find new routes in the cardiac tissue
   2. An abnormal conduction pathway, through which an electrical impulse repeatedly enters and exits
   3. An attempt to get into a restaurant once thrown out
3. Measurement properties of an ECG lead may be utilized in defibrillation studies
   1. True
   2. False
4. Defibrillation electrodes are large in size. This is because
   1. larger electrodes produce more homogeneous lead fields
   2. current density at the electrode is smaller
   3. electrode impedances are smaller
   4. all of the above

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