AVAI: Atrial Ventricular Arrythmia Incidence
Ventricular TachycardiaAtrial FibrillationThe purpose of this observational study is to collect data regarding the population of patients implanted with St. Jude Medical ICD.
MAVRIC VR ICD Registry
Ventricular TachycardiaVentricular FibrillationThe purpose of this registry is to collect information on the health status of patients receiving Marquis/Maximo VR Implantable Cardiac Defibrillators (ICDs), how the devices are being programmed and how this correlates to clinical patient outcome.
Linkage Study of Long QT Syndrome In An Amish Kindred
Heart DiseasesCardiovascular Diseases4 moreTo screen by electrocardiography the entire population of 1,400 individuals in seven Amish Mennonite communities in order to perform genetic linkage studies of long QT syndrome (LQTS).
Tachy Prediction Download Study
Ventricular TachycardiaThe purpose of the Medtronic Tachy Prediction Download (TPD) study is to collect data from an implantable cardiac defibrillator (ICD) device that will be used to identify markers for imminent onset of ventricular arrhythmias.
Symptom Burden Guiding Invasive Electrophysiological Study in Paroxysmal Supraventricular Tachycardia...
Supraventricular TachycardiaBELIEVE-SVT is a European multi-centre, retrospective registry in tertiary hospitals performing electrophysiological study in patients with palpitations considered clinically suggestive of paroxysmal supraventricular tachycardia by a cardiologist and without electrocardiographic documentation of tachycardia or preexcitation. Clinical characteristics, results of electrophysiological study and ablation, complications, and clinical outcomes during follow-up will be analysed.
DF4 Connector System Post-Approval Study
Ventricular TachycardiaVentricular Fibrillation2 moreThe purpose of this study is to evaluate long-term performance of the DF4 Connector System. This evaluation is based on the number of DF4 lead-related complications occurring during the study compared to the number of leads enrolled in the study. The DF4 systems will be followed for 5 years after implant. This study is required by FDA as a condition of approval of the DF4 Connector Systems. This study is conducted within Medtronic's post-market surveillance platform.
Feature Assessment Study for Indications Based Programming
Ventricular TachycardiaVentricular Flutter2 moreThe purpose of this evaluation is to assess the acceptance level of specific programming recommendations based on the patient's clinical needs and primary indications when using the feature 'Indications Based Programming' (IBP) available in the ZOOMVIEW Software Application for the TELIGEN DR / VR and COGNIS family of devices compared to daily life programming chosen by physicians.
Catheter Ablation for Nonsustained Ventricular Tachycardia in Patients With Ischemic Cardiomyopathy...
Ventricular TachycardiaIschemic Cardiomyopathy1 moreDespite established implantable cardioverter-defibrillator (ICD) therapy and catheter ablation for sustained ventricular tachycardia (VT) in patients with ischemic heart disease (IHD) and reduced left ventricular ejection fraction (LVEF), the efficacy of catheter ablation in patients with nonsustained VT has been not yet clarified. The incidence of appropriate ICD therapy itself has been reported to be a worse prognostic factor in patients with reduced LVEF. Therefore theoretically the inhibition of these ventricular incidences can result in the prognostic improvement.To suppress ventricular arrhythmias aside from antiarrhythmic agents, catheter ablation has been developed prominently in this decade along with the technological improvement such as irrigated ablation catheters, three-dimensional mapping systems, multi-polar catheters, and image integration system with CT and MRI. The rationale of this trial is to study the efficacy of the eradication of arrhythmogenic substrate in ischemic cardiomyopathy with reduced LVEF and nonsustained VT on prevention of the occurrence of sustained VT/VF and ICD therapies.
Biomarkers in Risk Stratification of Sustainted Ventricular Tachycardia or Electrical Storm After...
Heart FailureVentricular Tachycardia1 morePrevalence of HF reaches 1-2% of developed populations, and consequently a significant problem becomes more frequent occurrence of ventricular arrhythmias (VA) - sustained ventricular tachycardia (sVT) and electrical storm (ES) requiring radiofrequency ablation. The aim of the study is to create a model of risk stratification to identify patients with increased risk of occurrence of composite (cardiovascular death or rehospitalization, arrhythmia recurrence) and secondary (inadequate device therapy, all-cause death or rehospitalization, intensification of atrial arrhythmia) endpoints after ablation of ES or sustained VT. Model will be based on additional measurements of N-terminal pro brain natriuretic peptide (NT-proBNP), Galectin-3, suppressor of tumorigenicity 2 (ST2), high sensitive troponin T (hs-TnT), high sensitive C-reactive protein (hs-CRP), iron deficiency to clinical-, electrocardiographic- and echocardiographic assessment.
Acute Cardiovascular Events Triggered by COVID-19-Related Stress
Acute Myocardial InfarctionVentricular Tachycardia3 moreThe current COVID19 pandemic has afflicted almost the whole globe. The stress related to the pandemic, not the direct virus-related injury, can be potentially associated with acute cardiovascular events due to a large list of physical and psychosocial stresses. This study is a cross sectional study that will enroll patients evaluated during the COVID19 pandemic period for acute cardiovascular events.