The tilt test was considered positive when syncope ... Patients were positioned upright at a 70-degree angle until a 45-minute standing period was attained, or until severe symptoms or syncope ...

The different tilt angles were 0, 13, 25, 30, 35, 40, 45, and 90 degrees. “Literature surveys have consistently demonstrated that within the 30-degree to 60-degree tilt range, bifacial PV ...