What Happens before Syncope? Study of the Time Frame Preceding Vasovagal Syncope

<table>Mean of heart rate, systolic arterial pressure, tidal volume, respiratory frequency, CO<sub>2</sub> and O<sub>2</sub> saturation in different study periods. Abbreviations: VVS: vaso-vagal syncope; SAP: systolic arterial pressure; RF: respiratory frequency; V<sub>T</sub>: tidal volume; HR: heart rate; OP: early orthostatic phase; PP: preceding phase.</table>

International Scholarly Research Notices

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Figure 1

Figure 1: What Happens before Syncope? Study of the Time Frame Preceding Vasovagal Syncope 