6223
The simultaneous recording of electrical activity from the surface electrocardiogram , right ventricular apex , His bundle , high right atrium , coronary sinus , with or without a roving mapping catheter , enables us to precisely map the electrical activation sequence in the heart .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None