View clinical trials related to Tachycardia.
Filter by:Over the last decade, radiofrequency catheter ablation (RFCA) has become an established treatment for ventricular arrhythmias (VA). Due to the challenging nature of visualizing lesion formation in real time and ensuring an effective transmural lesion, different surrogate measures of lesion quality have been used. The Ablation Index (AI) is a variable incorporating power delivery in its formula and combining it with CF and time in a weighted equation which aims at allowing for a more precise estimation of lesion depth and quality when ablating VAs. AI guidance has previously been shown to improve outcomes in atrial and ventricular ablation in patients with premature ventricular complexes (PVC). However research on outcomes following AI-guidance for VT ablation specifically in patients with structural disease and prior myocardial infarction remains sparse. The investigators aim at conducting the first randomized controlled trial testing for the superiority of an AI-guided approach regarding procedural duration.
New onset heart failure (HF) is observed in up to 25% of patients with incident atrial fibrillation or flutter (AF). Current guidelines suggest that both conditions (AF & HF) be addressed with guideline directed medical therapy (GDMT) for HF and rate or rhythm control of AF. Hence, patients with both conditions are subjected to extensive polypharmacy with possible prognostic benefits, but also possible side effects, such as decreased renal function, dizziness, tiredness and hypotension, as well as the financial burden on both the individual patients and society, in addition to the stigma of having a HF diagnosis. Guidelines do not inform how to manage long-term patients with HF, who following control of the incident tachycardia (e.g. AF), show full recovery from their HF condition. This investigator-initiated, open-label, randomized, non-inferiority trial will test whether incremental weaning of GDMT in patients following full cardiac recovery and AF control is non-inferior compared to continuous GDMT with respect to the primary endpoint of freedom from heart failure deterioration. Furthermore, this study seeks to extensively phenotype these patients (genetic testing, advanced imaging, biomarkers etc.) in order to establish whether certain phenotypes are at lesser or greater risk of deterioration once remission is established. This novel approach of a personalized treatment regimen depending on e.g. genetic profiling could lead to an aggressive treatment in patients at high risk of deterioration and conversely spare patients with a negligible risk, a life-long intensive treatment regimen. All HF clinics located in Zealand, Denmark, with a catchment area of >2 million citizens, have agreed to participate in the WEAN-HF trial. A total of 348 patients will be randomized. Patients are followed up the 1st year after randomization with clinical examination, biomarkers and echocardiography, and are subsequently followed via Danish nationwide registries for 10 years.
The study is a prospective single-arm multicenter clinical trial. Adult patients will be consented and enrolled in an outpatient cardiology office or Arrhythmia Clinics.
The CHANNELED-Registry is a multicenter retrospective study to (1) systematically assess the mechanism and origin of ventricular tachycardia in patients with end-stage heart failure carrying an left ventricular assist device (LVAD) and (2) to evaluate procedural parameters and outcome of ventricular tachycardia ablation in this special subset of patients.
Over the last decade, radiofrequency catheter ablation (RFCA) has become an established treatment for ventricular arrhythmias (VA). Due to the challenging nature of visualizing lesion formation in real time and ensuring an effective transmural lesion, different surrogate measures of lesion quality have been used. The Ablation Index (AI) is a variable incorporating power delivery in its formula and combining it with CF and time in a weighted equation which aims at allowing for a more precise estimation of lesion depth and quality when ablating VAs. AI guidance has previously been shown to improve outcomes in atrial and ventricular ablation in patients with premature ventricular complexes (PVC). However research on outcomes following AI-guidance for VT ablation specifically in patients with structural disease and prior myocardial infarction remains sparse. We aim at conducting a prospective observational multicenter registry investigating the efficacy and safety of AI-guided VA ablation in patient with ischemic and non-ischemic cardiomyopathy.
Prospective, observational, single center, pilot study to analyze the feasibility of motion and structural data integration in patients with ventricular arrhythmia by means of artificial intelligence for improved arrhythmogenic substrate characterization and motion management during stereotactic arrhythmia radioablation.
Patients with Postural Orthostatic Tachycardia Syndrome (POTS) and Post-Acute Sequelae of COVID (PASC, or "Long COVID") experience cognitive dysfunction. The investigators will test the hypothesis that 999 mL of IV saline will improve cognitive function in patients with POTS and Long COVID compared to placebo (50 mL of saline).
The goal of this randomized clinical trial is to compare the 3D electroanatomical activation map-quality and -efficiency in patients undergoing atrial tachycardia (AT) catheter ablation. Primary objective of the study is to contrast CARTO-Coherent mapping quality (electrograms per map) using Octaray versus Pentaray catheter for left and right atrium ATs, separately. Participants will be randomized with 1:1 ratio for undergoing 3D anatomy map with either Octaray (intervention group) or Pentaray (control) group. Next, all patients will undergo activation map of the AT with both catheters. For ablation in the intervention group, the Ocatray made activation map of the AT will be used, and the Pentary made AT activation map will be used in the control group.
Among patients early following ST-segment (ST) elevation myocardial infarction, transcutaneous vagus nerve stimulation is associated with a reduce of the burden of premature ventricular contractions in the first 40 days post-myocardial infarction (MI). The above hypothesis will be tested with a randomized, prospective, parallel, single-blind clinical trial. The expected study duration is approximately 12 months from the time the first subject is enrolled (planned for June 2023) to the time of study's termination date (December 2024). Patient enrollment is planned to take place at two major centers in Greece. The researchers will obtain approval by the institutional review board (IRB).
The study will systematically evaluate how an emergency manual-a collection of checklists and fact sheets-affects the performance of resuscitation teams during the management of priority one patients in an emergency department.