Different types of arrhythmia

Reasonably loose subject, so bear with me.
The term arrhythmia defines (broadly) the conditions in which there is abnormal electrical activity of the heart. Whilst some arrhythmia is a symptom of something underlyingly sinister, arrhythmia is also reasonably common an non-fatal. Some key types of arrhythmia in cardiac arrest are:
- (atrial/ventricular) Fibrillation
- Bradycardia
- Tachycardia
- Asystole

Each has its own specific treatments, pathophysiology, etc.
Fibrillation is an uncoordinated tremor of the heart, such that contractions (and thus blood flow) are ineffective.
Bradycardia is a slowed heart rate (can be regular), specifically under 60 beats per minute.
Tachycardia is the opposite, where the heart beats upward of 100 beats per minute (in years >15).
Asystole is the dummy answer for a type of arrhythmia in cardiac arrest - the state of no cardiac electrical activity (ie flatline, dead, etc).

Given this, under the setting of the PCL, where Han 'has a relatively steady but slow pulse', it would be a reasonable assumption to make that bradycardia is of particular relevance.

Sam

http://www.nlm.nih.gov/medlineplus/arrhythmia.html