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109 studies found for:    Open Studies | "Tachycardia"

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21 Recruiting Pilot Study of Catheter Ablation for Ventricular Tachycardia in Patients With an Implantable Cardioverter Defibrillator
Condition: Ventricular Tachycardia
Interventions: Drug: amiodarone;   Drug: sotalol;   Device: Biosense Webster's NAVI-STAR Thermo-Cool
22 Recruiting Early Ablation Therapy for the Treatment of Ischemic Ventricular Tachycardia in Patients With Implantable Cardioverter Defibrillators
Conditions: Ventricular Tachycardia;   Ischemic
Interventions: Drug: Drug Treatment;   Device: Catheter Ablation
23 Recruiting Endo- and Epicardial vs. Endocardial Ablation of Ventricular Tachycardia in Patients With Cardiac Disease
Condition: Ventricular Tachycardia
Interventions: Procedure: Strategy 1 - endocardial ablation;   Procedure: Strategy 2 - endocardial and epicardial ablation
24 Recruiting Patients' Perspective on Radiofrequency Catheter Ablation of AVRT and AVNRT
Conditions: Tachycardia, Atrioventricular Nodal Reentry;   Re-entrant Atrioventricular Tachycardia
Intervention: Procedure: RFA
25 Recruiting Aldosterone & Sodium Regulation in Postural Tachycardia Syndrome - Screening
Condition: Postural Tachycardia Syndrome
Interventions: Other: Autonomic Function Testing;   Other: Posture Study;   Procedure: Measurement of Total Blood Volume;   Other: Exercise Capacity Test
26 Not yet recruiting Feasibility of Contact Force Catheter Mapping and Ablation in Epicardial and Endocardial Ventricular Tachycardias
Conditions: Ventricular Tachycardia;   Sudden Death;   Syncope;   Chest Pain
Intervention: Procedure: Catheter ablation
27 Recruiting Dietary Salt in Postural Tachycardia Syndrome
Condition: Postural Orthostatic Tachycardia Syndrome
Interventions: Radiation: Blood Volume;   Radiation: Total Blood Volume;   Procedure: Exercise Capacity Test - Bicycle;   Procedure: Posture Study
28 Recruiting Local Vasoconstriction in Postural Tachycardia Syndrome
Condition: Postural Tachycardia Syndrome
Interventions: Drug: Losartan;   Drug: Ascorbic Acid (Vitamin C);   Drug: Normal Saline
29 Recruiting Cognitive Dysfunction in Postural Tachycardia Syndrome
Condition: Postural Tachycardia Syndrome
Interventions: Behavioral: Seated Measurements;   Behavioral: Standing Measurements;   Behavioral: Self-Administered Surveys
30 Recruiting Dietary Sodium's Effect on Urinary Sodium and Dopamine Excretion in Patients With Postural Tachycardia Syndrome
Condition: Postural Orthostatic Tachycardia Syndrome
Interventions: Radiation: Total Blood Volume;   Procedure: Exercise Capacity Test - Bicycle;   Procedure: Posture Study
31 Recruiting Pathophysiology of Orthostatic Intolerance
Conditions: Tachycardia;   Postural Orthostatic Tachycardia Syndrome
Interventions: Radiation: DAXOR;   Procedure: QSweat;   Drug: Intrinsic Heart Rate
32 Recruiting Adrenocorticotropic Hormone Stimulation in Postural Orthostatic Tachycardia Syndrome (POTS)
Condition: Postural Tachycardia Syndrome
Intervention: Drug: Cosyntropin administration
33 Unknown † Using Non-Fluoroscopic Imaging Devices to Decrease Radiation Exposure During Ablation of Supraventricular Tachycardia
Condition: Supraventricular Tachycardia
Intervention: Device: Intracardiac echocardiography and 3D navigational system
34 Recruiting Ablation of Clinical Ventricular Tachycardia Versus Addition of Substrate Ablation on the Long Term Success Rate of VT Ablation
Condition: Ventricular Tachycardia
Intervention: Procedure: Radiofrequency Catheter Ablation (RFCA)
35 Recruiting Peripheral Dopamine in Postural Tachycardia Syndrome
Conditions: Postural Tachycardia Syndrome;   Orthostatic Intolerance
Interventions: Drug: Carbidopa;   Drug: Placebo
36 Unknown † The Renin-Aldosterone Axis in Postural Tachycardia Syndrome
Condition: Postural Tachycardia Syndrome
Intervention: Drug: Angiotensin II
37 Recruiting Assessment of Vascular Endothelial Function in Postural Tachycardia Syndrome
Condition: Postural Tachycardia Syndrome
Intervention: Device: Blood Pressure and Blood Flow
38 Unknown † Accuracy and Safety Study of the Magnetecs CGCI System for Intracardiac Mapping
Conditions: Tachycardia, Supraventricular;   Tachycardia, Ventricular
Interventions: Procedure: Remote magnetic navigation;   Device: Magnetecs Catheter Guidance Control and Imaging system
39 Recruiting Intravenous (IV) Saline and Exercise in Postural Tachycardia Syndrome (POTS)
Condition: Postural Tachycardia Syndrome
Interventions: Drug: Saline;   Other: Placebo
40 Recruiting Head Circumference Growth in Children With Ehlers-Danlos Syndrome Who Develop Dysautonomia Later in Life
Conditions: Ehlers Danlos Syndrome;   External Hydrocephalus;   Dysautonomia;   Postural Orthostatic Tachycardia Syndrome;   Venous Insufficiency
Intervention:
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† Indicates status has not been verified in more than two years