Every date is made by joining two Karana. There are only 11 Karana. Out of which Bava, Balva, Kaulava, Taitila, Gar, Vanija, Vishti are Char Karana and Shakuni, Chatuspada, Naga and Kinstughan are constant or Dhurv Karana.
Vishti Karana is not considered as an auspicious Karana in astrology. The person born in this Karana may be influenced by the maleficent Vishti Karana. He may have suspicious nature and may be associated with immoral activities. He will be attracted towards other women. He may go to any extent for revenge.