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Active clinical trials for "Arrhythmias, Cardiac"

Results 581-590 of 689

Berlin Beat of Running Study

Cardiac ArrhythmiaBrain Lesion1 more

This prospective observational study will investigate the frequency of new onset atrial fibrillation (AF) and of further cardiac arrhythmias as well as of (clinically silent) cerebral lesions in endurance runners before, during and after the BMW-Berlin Marathon 2011.

Completed5 enrollment criteria

Epidemiology of Symptomatic Arrhythmias

Cardiovascular DiseasesHeart Diseases5 more

To acquire a better understanding of the spontaneous clinical behavior of paroxysmal tachycardia by studying epidemiologic features of symptomatic tachycardia patients.

Completed1 enrollment criteria

Genetic Substudy of the Alternans Before Cardioverter Defibrillator (ABCD) Trial

Ventricular TachycardiaCardiovascular Diseases2 more

The ABCD clinical study (ClinicalTrials.gov Identifier NCT00187291) was designed to determine if a T-Wave Alternans (TWA) test is equivalent to an Electrophysiology Study (EPS) in predicting life-threatening heart rhythms in patients with ischemic heart disease, left ventricular dysfunction, and non-sustained tachycardia. The purpose of the ABCD Genetic sub-study is to identify genetic markers that predict TWA status and arrhythmia risk in this same population.

Completed5 enrollment criteria

Identification of Risk Factors for Arrhythmia in Children and Adolescents With Hypertrophic Cardiomyopathy...

Hypertrophic Cardiomyopathy (HCM)

This study will review medical information collected on children and adolescents with hypertrophic cardiomyopathy (HCM) to try to identify risk factors for arrhythmias (abnormal heart rhythms) in these patients and better guide the choice of treatment options for them. Arrhythmias arising from the ventricle (lower heart chamber) can cause dizziness, fainting or cardiac arrest. Predictors of arrhythmias in adult HCM patients may not apply to children and teenagers with HCM. Children and adolescents 21 years of age or younger who were diagnosed with HCM and evaluated in the National Heart Lung and Blood Institute's Cardiology Branch between 1977 and 2002 may be eligible for this study. Participants do not undergo any further testing or data gathering beyond a review of their medical records; only existing data previously collected for research purposes are used. Medical records are reviewed for age of the patient on admission to the NIH; family history of sudden death, fainting, exercise-induced low blood pressure, and results of tests on heart structure and function.

Completed1 enrollment criteria

Irbesartan for the Prevention of Atrial Arrhythmias and Cardiac Electrical Remodeling in Patients...

Atrial FibrillationHypertension

The purpose of this study is to determine whether irbesartan will reduce the rate of recurrent atrial high rate episodes and the development of clinical sustained atrial fibrillation in patients with hypertension and permanent pacemaker.

Unknown status17 enrollment criteria

Clinical Performance of the AFGen1 Device Over a 7-day Period

Atrial FibrillationAfib6 more

AFGen1 is indicated for use on symptomatic or asymptomatic adults who are at risk of developing or who have atrial fibrillation, where a software assisted analysis of ambulatory ECG is needed to identify episodes of Afib. The purpose of this study is to establish the clinical performance of the AFib-Chek device (a.k.a. Device) on human participants.

Completed8 enrollment criteria

Pulse Waveform and ECG Analysis in Postoperative Cardiac Surgical Patients

Blood PressureArrhythmias1 more

Observational study of 20 postoperative cardiac surgery patients. On admission to the ICU the patients will receive a noninvasive monitor recording arterial pulse waveform and ECG. The monitoring will continue to the ward for two days. The data will be compared with the routine monitoring methods.

Completed2 enrollment criteria

Patient Reported Outcome Measures for Ablation of Cardiac Arrhythmias

Cardiac Arrhythmia

A multicentre, prospective observational study to develop, evaluate and validate Patient Reported Outcome Measures (PROMs) for patients treated with cardiac ablation for symptomatic cardiac arrhythmias

Completed6 enrollment criteria

Cardiac Rhythm Disturbances in Hard-to-treat Epilepsy Patients Using Loop ECG Recorders

Epilepsy

Seizure-related cardiac arrhythmias are one of the possible causes of sudden unexpected death in epilepsy (SUDEP). Identification of these patients is challenging because cardiac rhythm disturbances could emerge only during seizures. Furthermore, patients could have transitioned sinus or AV node blocks which could cause syncopes with brady-related seizures which could be treated as epilepsy-related seizures. Implantable loop recorders have an ability to recording single-channel ECG for up to 36 months which give an ability to detect these heart disturbances. The purpose of this study is to look the incidence and types of arrhythmias which occur in 150 patients with hard-to-treat partial seizures and secondarily generalized seizures

Completed7 enrollment criteria

Efficacy of Snap on Symptomatic Arrhythmia

Arrhythmia

Participants in the Snap arm were instructed to undertake once-day recording and transmission of a 30-second single-lead iECG trace to a secure server, plus additional submissions if symptomatic over a 3-month period. Snap traces were analyzed by an automated analysis software and cardiologists. Clinical review and appropriate care was arranged for those clinically significant arrhythmia. Patients in the RC group were followed up as normal methods including ECG, Holter.

Unknown status2 enrollment criteria
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