Active clinical trials for "Arrhythmias, Cardiac"

The purpose of this study is to learn the effects of a test drug on heart rhythm, and to provide additional data to see if the test drug is well tolerated and safe.

The aim of this study is to determine if anti-arrhythmic drugs with a sodium channel-blocking mechanism exert a detrimental electromechanical effect on cardiac function in patients depending upon baseline intraventricular conduction and left ventricular function.

To compare the efficacy and stability of an ICT-based centralized clinical trial monitoring system against the efficacy and stability of an existing outpatient-based electrocardiogram (ECG) and Holter monitoring system for arrhythmia detection after atrial fibrillation ablation, and to test whether such continuous monitoring can better detect arrhythmia that is undetectable by existing methods and how this may affect treatment outcomes

Successful radio frequency (RF) cardiac catheter ablation requires the creation of lesions by delivering energy while maintaining adequate catheter contact with the endocardium. Unfortunately, it is difficult to identify contact intraoperatively as a typical RF ablation catheter lacks clear indications of contact. We propose to use the Boston Scientific IntellaTip MiFi catheter to explore whether characteristics of the electrograms produced by the mini-electrodes on the ablation tip could help confirm tissue contact. Using an ultrasound catheter to define instances of clear contact and non-contact, we will determine whether the micro-electrodes produce sufficient information to confirm catheter contact. We propose that the MiFi catheter produces sufficient signal characteristics that can be used as an effective surrogate for adequate tissue contact.

The purpose of this study is to test the hypothesis that dietary supplementation with an algal source of docosahexaenoic acid (DHA) can improve the heart rate variability in elderly patients.

An implantable cardioverter defibrillator (ICD) is a small device that is implanted in the chest and uses electrical shocks to control arrhythmias, which are abnormal heart rhythms. Arrhythmias can be caused by many factors, including stress and anger. This study will evaluate the use of a stress reduction treatment (SRT) program aimed at reducing the occurrence of arrhythmias that require treatment with an ICD shock.

The objective of this study is to determine if concentrations of amiodarone in fat tissue increases constantly over time during chronic treatment with this drug, and if blood concentrations reflect accurately the concentrations in fat tissue or not. This is because excessive concentrations of this drug in tissues can produce adverse effects.

The purpose of this study is to find out if specialized programs in the AT500 and EnRhythm pacemakers will reduce the number of irregular heartbeat in the upper chamber of the heart and reduce symptoms (such as shortness of breath, dizziness, and others).

Relationship between carbetocin dose on transmural dispersion of repolarization (TDR).

106 subjects selected from 3 study sites in China are with indications for intracardiac electrophysiological examination. The trial is to prove the clinical effectiveness and safety of Qubic Stim Cardiac Stimulator in Chinese population.