Table 3 Baseline characteristics of vignettes
Patient factor | Category (level) | Frequency |
|---|---|---|
Total of vignettes, n | 1646 | |
Origin of event, n (%) | a. During rest b. During exercise | 829 (50.4%) 817 (49.6%) |
Triggering factors, n (%) | a. No triggering factors b. Pain c. Emotion(al) d. Prolonged standing | 388 (23.6%) 377 (22.9%) 449 (27.3%) 432 (26.2%) |
Prodromal symptoms, n (%) | a. No prodromal symptoms b. Light headedness/dizziness c. Nausea, paleness, sweating d. Visual disturbances | 416 (25.3%) 405 (24.6%) 429 (26.1%) 396 (24.1%) |
Red flags, n (%) | a. No red flags b. Sudden cardiac death < 40 years of age, in family history c. Cardiovascular abnormalities, pulmonary embolism or pulmonary hypertension in medical history d. First syncopal episode > 35 years of age | 438 (26.6%) 421 (25.6%) 402 (24.4%) 385 (23.4%) |
Prehospital ECG, n (%) | a. Normal ECG b. Abnormal ECG | 840 (51.0%) 806 (49.0%) |