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Orthostatic Intolerance clinical trials

View clinical trials related to Orthostatic Intolerance.

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NCT ID: NCT03759574 Recruiting - Clinical trials for Postoperative Complications

Pathophysiologic Hemodynamics After Primary Unilateral Total Hip Arthroplasty (THA)

Start date: March 18, 2019
Phase:
Study type: Observational

Incidence and pathophysiologic hemodynamics of orthostatic intolerance and orthostatic hypotension in patients undergoing unilateral THA

NCT ID: NCT02365012 Recruiting - Parkinson's Disease Clinical Trials

Treatment of Orthostatic Intolerance in Patients With Parkinson's Disease Using Midodrine

Start date: April 2014
Phase: N/A
Study type: Interventional

This study will evaluate whether treatment with the α1-agonist, midodrine, reduces subjective orthostatic lightheadedness as measured by the Non-Motor Symptoms Scale for Parkinson's Disease (NMSS) questionnaire, in patients with (positive control group, OH) or without documented orthostatic hypotension(orthostatic intolerance, OI). It will also demonstrate the effect of treatment with an α1-agonist, midodrine, on beat-to-beat blood pressure and heart rate response during Valsalva maneuver (measured by Continuous Non-invasive Arterial Pressure, CNAP) in patients with OI or OH and evaluate the relationship to symptom improvement.

NCT ID: NCT01866787 Recruiting - Clinical trials for Total Hip Replacement

Study on Baroreceptor Function in Relation to Orthostatic Blood Pressure Regulation After Hip Surgery

Start date: January 2013
Phase: N/A
Study type: Observational

The purpose of this observational study is to evaluate the baroreceptor function in relation to surgical inflammation and orthostatic intolerance after elective hip arthroplasty. The main hypothesis is that baroreceptor function is attenuated after surgery and related to surgical inflammation.

NCT ID: NCT00608725 Recruiting - Tachycardia Clinical Trials

Pathophysiology of Orthostatic Intolerance

Start date: December 1996
Phase: N/A
Study type: Interventional

The purpose of this study is to describe the mechanism of orthostatic intolerance, relying on cardiovascular physiological studies. The syndrome is of undetermined etiology, but the syndrome causes impairment of a number of young adults, females more than males, with symptoms of tachycardia, fatigue, lightheadedness, palpitations, blurred vision, chest discomfort, difficulty concentrating, and dizziness with the upright posture. It is believed that many different pathophysiological processes can give rise to this disorder.