79 studies found for:    arrhythmia OR atrial fibrillation OR ventricular fibrillation OR tachycardia OR bradycardia | Open Studies | NIH, U.S. Fed
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arrhythmia OR atrial fibrillation OR ventricular fibrillation OR tachycardia OR bradycardia | Open Studies | NIH, U.S. Fed (79 records)
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Rank Status Study
1 Unknown  The Maintenance of Human Atrial Fibrillation
Conditions: Atrial Fibrillation;   Arrhythmias, Cardiac
Intervention:
2 Recruiting Vein of Marshall Ethanol Infusion for Persistent Atrial Fibrillation FIBRILLATION
Conditions: Ventricular Tachycardia;   Atrial Fibrillation
Interventions: Drug: Ethanol;   Procedure: Ablation
3 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
4 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
5 Recruiting A Pilot Trial of Phenylephrine Versus Norepinephrine for Septic Shock in Critically Ill Patients
Conditions: Septic Shock;   Sepsis;   Shock;   Tachycardia;   Arrhythmia
Interventions: Drug: Phenylephrine;   Drug: Norepinephrine
6 Not yet recruiting Substrate Versus Trigger Ablation for Atrial Fibrillation
Condition: Atrial Fibrillation
Interventions: Procedure: FIRM Ablation;   Procedure: Conventional AF ablation with PVI
7 Recruiting Adrenocorticotropic Hormone Stimulation in Postural Orthostatic Tachycardia Syndrome (POTS)
Condition: Postural Tachycardia Syndrome
Intervention: Drug: Cosyntropin administration
8 Recruiting Catheter Ablation vs Anti-arrhythmic Drug Therapy for Atrial Fibrillation Trial
Conditions: Atrial Fibrillation;   Arrhythmia
Interventions: Device: Left atrial ablation;   Drug: Rate or Rhythm Control Therapy
9 Unknown  The Dynamics of Human Atrial Fibrillation
Conditions: Atrial Fibrillation;   Atrial Tachyarrhythmia
Intervention:
10 Recruiting Using the Optical Frequency Domain Imaging (OFDI) Capsule to Image the Esophagus in Patients Who Have Atrial Fibrillation and Have Undergone Radio Frequency (RF) Ablation
Condition: Atrial Fibrillation
Intervention: Device: OFDI Capsule
11 Recruiting A Study of Pyridostigmine in Postural Tachycardia Syndrome
Condition: Postural Tachycardia Syndrome
Interventions: Drug: pyridostigmine;   Drug: Placebo
12 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
13 Recruiting Influence of Sleep Apnea on Risk of Atrial Fibrillation
Conditions: Sleep Apnea;   Atrial Fibrillation
Intervention: Other: Continuous Positive Airway Pressure
14 Unknown  Stress Reduction Program to Reduce Abnormal Heart Rhythms Treated With Implantable Cardioverter Defibrillators (The RISTA Study)
Condition: Arrhythmias, Cardiac
Intervention: Behavioral: Stress reduction treatment (SRT) program
15 Recruiting Pathophysiology of Orthostatic Intolerance
Conditions: Tachycardia;   Postural Orthostatic Tachycardia Syndrome
Interventions: Radiation: DAXOR;   Procedure: QSweat;   Drug: Intrinsic Heart Rate
16 Recruiting Identification of Genomic Predictors of Adverse Events After Cardiac Surgery
Conditions: Heart; Dysfunction Postoperative, Cardiac Surgery;   Genetic Predisposition to Disease;   Atrial Fibrillation;   Myocardial Infarction;   Heart Failure
Intervention:
17 Recruiting Effect of Dietary Sodium Intake on Vascular Endothelium
Condition: Postural Tachycardia Syndrome (POTS)
Interventions: Procedure: Pulsitile Arterial Tonometry (PAT) Protocol;   Device: Calf Blood Flow in Reactive Hyperemia (CBF-RH);   Device: Evaluation of Forearm-Mediated Dilation
18 Recruiting Positive Therapy for Autonomic Function & Mood in ICD Patients
Conditions: Ventricular Arrhythmia;   Implantable Cardioverter Defibrillator
Interventions: Behavioral: Quality of Life Therapy (QOLT);   Behavioral: Heart Healthy Education (HHE)
19 Unknown  Predictors of Anticoagulation Control on Warfarin Therapy
Conditions: Atrial Fibrillation;   Deep Vein Thrombosis;   Heart Valve Replacement
Intervention:
20 Recruiting Clinical Autonomic Disorders: A Training Protocol
Conditions: Chronic Fatigue Syndrome;   Pseudopheochromocytoma;   Healthy Volunteers;   Neurocardiogenic Syncope;   Postural Tachycardia Syndrome
Intervention:

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