Table.
The Clinical Characteristics of These Six Cases.
| Case No. |
Sex | Age | Time to VVR |
Past history of VVR |
CI | VD or Mixed |
Medication |
|---|---|---|---|---|---|---|---|
| No.1 | M | 26 y/o | 30 min | None | Present | None | None |
| No.2 | M | 22 y/o | 17 min | Present | Present | None | None |
| No.3 | F | 20 y/o | 40 min | None | None | Present | None |
| No.4 | F | 17 y/o | 10 min | None | None | Present | Normal saline DIV |
| No.5 | M | 19 y/o | 25 min | None | None | Present | None |
| No.6 | M | 35 y/o | 16 min | Present | Present | None | Atropine IV |
M: male, F: female, y/o: years old, CI: cardioinhibitory response, VD: vasodepressor response, VVR: vasovagal response, IV: intravenous injection, DIV: intravenous transfusion
CI is defined as decreased heart rate (less than 40 bpm for at least 20 seconds) with hypotension during syncope or presyncope, while VD is defined as hypotension without decreased heart rate (not less than 40 bpm) during syncope or presyncope, and mixed type was defined as hypotension with a short duration of heart rate decrease (less than 40 bpm for less than 20 seconds) (reference 9).