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The head-up tilt table test usually takes one to two hours to complete. However, that may vary depending on the changes observed in your blood pressure and heart rate and the symptoms you experience during the test. Before the test begins, a nurse will help you get ready. The nurse will start an IV (intravenous) line.
Rapid testing at a community health center or clinic usually requires blood (either drawn by puncturing a vein or from a finger prick) or saliva (i.e., from an oral swab). Results can take anywhere from 2 to 40 minutes but generally take 10 to 20 minutes. Laboratory-based tests use methods that are more accurate, but may also take longer (generally 30 minutes to more than 3 hours). This makes laboratory-based testing well suited for confirming the results of a rapid or at home test.