View clinical trials related to Tachycardia.
Filter by:The purpose of this study is to evaluate feasibility of using new technologies to characterize ventricular wall motion in patients indicated for mapping and ablation procedures. Echo will be performed preoperatively and patients will receive a 1-month followup telephone call.
It was hypothesized that the use of esmolol as an alternative to remifentanil with sevoflurane inhalation anesthesia during intracranial surgery, could provide better hemodynamic conditions and cause lesser side effects in the perioperative period. It was the main objective of this study to compare the effect of esmolol and remifentanil on the incidence of tachycardia and hypertension and the intraoperative fentanyl consumption. The comparison of postoperative troponine I and creatine phosphokinase levels and EKG changes were the secondary objectives.
The Medtronic Market-Released DF4 Lead Imaging Study is a prospective, non-randomized study, multi-center clinical investigation. The purpose of this clinical investigation is to collect high quality medical images of the Medtronic Market-Released DF4 lead in the shoulder and heart. Images collected during the study will allow for lead design and testing processes better tailored to the implanted environment.
Dysautonomia, primarily defined as postural orthostatic tachycardia syndrome (POTS) can seriously disrupt a child's daily activities. It is most commonly associated with nausea or abdominal pain. In preliminary studies, when orthostatic intolerance was treated with fludrocortisone, a standard therapy for orthostatic intolerance (OI), symptomatic improvement in nausea was observed. However, children with POTS were also observed to have higher supine mean arterial pressure (MAP) (preliminary data) and greater suppression of the baroreceptor reflex sensitivity (BRS) occurred upon up-right tilt. While fludrocortisone alleviates nausea associated with OI, its long-term use may pose long term health risks to children including worsening hypertension. Therefore, it is the objective of this study to define the mechanism for OI as it relates to nausea. The investigators hypothesize that OI resulting from changes in the autonomic nervous system is the likely mechanism for the nausea observed in the patients in this study. The investigators further hypothesize that this is potentially an early marker for future cardiovascular problems such as early onset hypertension and cardiac hypertrophy. The general objective of this protocol is to address this gap in knowledge by determining the autonomic characteristics of children with OI as well as defining neurohumoral profiles for these subjects to better understand the cause of the elevated supine in these subjects. By better understanding the potential mechanism for this condition, it is the investigators future goal to develop a more focused and safer treatment strategy. The investigators will study subjects between 10 to 18 years of age utilizing the tilt table to mimic daily life stressors and also measure serum levels of epinephrine, norepinephrine, rennin, angiotensin II, aldosterone, and vasopressin at baseline and during tilt. This study will generate data with high impact in that more rational treatments for management of dysautonomia could be chosen on the basis of the profile of dysautonomia and neurohumoral markers.
Atrioventricular nodal reciprocating tachycardia (AVNRT) and atrioventricular reciprocating tachycardia (AVRT) are two similar supraventricular re-entry tachycardias (SVT) emerging in relatively young age in patients without apparent structural heart disease or significant comorbidities. The treatment of choice in those patients is radiofrequency ablation (RFA). The PPRA study is a prospective observational study developed to thoroughly analyze quality of life, utility and willingness-to-pay of Polish patients undergoing RF ablation of AVNRT or AVRT. Based on collected data the investigators will prepare a profile of patient who will benefit most from radiofrequency ablation and who should be scheduled in first place for the ablation in case of problems with accessibility to this service. What is more an analysis of medical and indirect costs of care will be performed.
The purpose of the THORN registry is to show the ability of Home-Monitoring® to early identify and manage the inappropriate diagnoses of ventricular arrhythmia in ICD patients (i.e. lead rupture, atrial arrhythmia, oversensing…) whatever the type of device (single, dual, or triple chamber). The electromyograms (iEGMs) provided by Remote Patient Monitoring will help the physician to early detect inadequate arrhythmia detection (ID) that can be responsible for inappropriate therapies (IT), and to take preventive actions in order to reduce the burden of these inappropriate therapies. THORN is an observational epidemiologic, prospective and multicenter registry. The primary objective is to measure the relative proportion of patients experiencing at least one inappropriate therapy during a fifteen months follow-up period. Moreover, THORN will assess the incidence, predictors, outcome and recurrence of inappropriate diagnoses in 1750 ICD patients.
Background: The pneumatic tourniquet is frequently used in total knee arthroplasty. Tourniquet deflation may result in hypotension and tachycardia caused by the rapid shift of blood volume back to the ischemic limb and a decrease in cardiac preload. Passive leg raising (PLR) represents a "self-volume challenge" that can result in an increase in preload. Such a PLR-induced increase in preload was hypothesized to attenuate the decrease in preload resulting from tourniquet deflation. This study was designed to evaluate the effect of PLR on hypotension and tachycardia following tourniquet deflation. Methods: Seventy patients who underwent unilateral total knee arthroplasty were assigned to either the bilateral PLR group (n = 35) or the control group (n = 35), in a prospective randomized trial. The patients' blood pressure and heart rate were measured before, during, and after tourniquet deflation.
The aim of this study is to evaluate the prophylactic effects of Ranolazine on new onset atrial fibrillation in post-operative coronary artery bypass graft and valve surgery patient population at Staten Island University hospital.
The purpose of this retrospective study is to test the hypothesis that uncontrolled tachycardia serves as a risk factor for adverse cardiovascular events and poor outcome after Subarachnoid Hemorrhage (SAH).
The purpose of this study is to compare the safety and effectiveness of cryoablation and radiofrequency ablation in the treatment of the commonest kind of supraventricular tachycardia, namely atrioventricular nodal reentrant tachycardia. The study hypothesis is that cryoablation is non-inferior to radiofrequency.