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Syncope: Difference between revisions
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Orthostatic hypotension can be divided into three variants depending on the time interval between rising from supine position to complaints of light-headedness and/or fainting. | Orthostatic hypotension can be divided into three variants depending on the time interval between rising from supine position to complaints of light-headedness and/or fainting. | ||
[[Image:Orthostatic.JPG|center]] | |||
Initial orthostatic hypotension is defined as a transient blood pressure decrease (>40 mmHg systolic blood pressure (BP) and/or >20 mmHg diastolic BP) within 15 seconds of standing. It can only be present during active standing, because the initial drop in BP is not seen during head-up-tilt test in which both BP and heart rate (HR) gradually increases until stabilization is reached. Because of the rapid initial changes, it can only be detected by continuous beat-to-beat BP measuring of finger arterial. | Initial orthostatic hypotension is defined as a transient blood pressure decrease (>40 mmHg systolic blood pressure (BP) and/or >20 mmHg diastolic BP) within 15 seconds of standing. It can only be present during active standing, because the initial drop in BP is not seen during head-up-tilt test in which both BP and heart rate (HR) gradually increases until stabilization is reached. Because of the rapid initial changes, it can only be detected by continuous beat-to-beat BP measuring of finger arterial. | ||