Active clinical trials for "Bradycardia"

The intent of this study is to evaluate the performance of the implanted Accent MRI TM system in a clinical setting and optionally in the MRI environment. This system includes the St. Jude Medical Tendril MRI™ lead and SJM Accent MRITM DR pacemaker. Also the MRI Activator™ will be evaluated in this study. The MRI Activator is a handheld device that allows the user to enable and disable MRI Settings as well as check the status of MRI Settings in the pacemaker. The patient population under study includes patients with a standard bradycardia pacing indication.

Prospective study assessing the incidence of atrial high rate episodes (AHRE) in pacemaker patients with and without previously diagnosed AT.

Pulling the eyeball during ophthalmic surgery provokes decrease in heart rate. This phenomenon is called oculocardiac reflex. In some patients asystole may occur. Other cardiac features of this reflex include hypotension, dysrhythmias, atrioventricular block. These cardiovascular disturbances may lead to decreased perfusion and ischemia of vital organs. Patients with existing cardiovascular disease are in risk of complications. Cardiovascular system is mainly innervated with autonomic nervous system (ANS). Sympathetic/parasympathetic activity may be determined by Heart Rate Variability (HRV). HRV analysis based on short 5 minutes electrocardiography has been found useful for prediction of hypotension and bradycardia during induction of general anaesthesia and during spinal block. The aim of this study is to verify whether it is possible to predict oculocardiac reflex with the use of HRV analysis for ANS activity assessment, measured prior to the ophthalmic surgery.

The purpose of the study is to demonstrate that reduction of unnecessary pacing provided by RYTHMIQ algorithm programed to ON in a pacemaker is associated with better clinical outcomes in bradycardia target population.

The Left interscalene block has a different effect on heart's autonomic nervous system, compared to Right interscalene block. This effect is evident on the occurrence of bradycardia and hypotension during shoulder surgery in the beach chair position

Spinal anesthesia is a safe technique, widely used and tested in the gynecological field, so as to be considered the first choice technique in cesarean section, which allows to quickly obtain a valid sensor and motor block. Bupivacaine is one of the most widely used drug for obtaining spinal anesthesia in pregnant women undergoing caesarean section. Bupivacaine is a local anesthetic available as a racemic mixture of its two enantiomers, the R (+)- dextrobupivacaine and the S (-) - levobupivacaine, whose clinical use is widely validated. Racemic bupivacaine is available as a simple or hyperbaric solution, the latter being the most commonly used for spinal anesthesia. Levobupivacaine, which is the pure levorotatory enantiomer of racemic bupivacaine, is a slightly hypobaric solution compared to liquor and has shown less heart and nerve toxicity, probably due to its ability to bind proteins more rapidly, and a greater selectivity towards the sensory component compared to Bupivacaine, presents action and effects better predictable. Its baricity would also offer the advantage of providing a less sensitive block to the position. Hypotension is one of the most common complications of spinal anesthesia and is particularly relevant in caesarean section because, in addition to the adverse effects on the parturient, it can have repercussions on the fetus through a reduction of placental perfusion. Some studies have showed a similar incidence of hypotension in patients treated with bupivacaine compared to those treated with levobupivacaine, while others assert an equivalence between the two drugs. In most studies, however, a significantly lower incidence of hypotension and a greater hemodynamic stability were reported in pregnant patients undergoing spinal anesthesia by caesarean section with levobupivacaine. Being both hyperbaric bupivacaine and levobupivacaine routinely used at the "G. Rodolico" Universitary Hospital of Catania for the spinal anesthesia of pregnant women undergoing caesarean section and being their use decided exclusively at discretion of the treating anesthesiologist, in the light of the discrepant data in the literature about the incidence of hypotension with the two drugs, the main objective of this observational study is to evaluate the hemodynamic effects mediated by levobupivacaine on pregnant women subjected to elective cesarean section and to compare them with those mediated by hyperbaric bupivacaine in an historical court of pregnant women subjected to caesarean section in the period between April 2017 and April 2018. The hemodynamic parameters will be monitored in real time with a non-invasive hemodynamic monitoring system (EV1000® platform + Clearsight® system - Edwards LifeSciences), routinely used in the "G. Rodolico" Universitary Hospital of Catania, allowing to obtain greater accuracy and veracity of the results compared to previous studies conducted on such anesthetics.

This is a large prospective registry of patients submitted to cardiac electronic devices implantation designed to investigate the incidence, risk factors and prognostic of thromboembolic complications associated with transvenous lead implantation.

The study utilizes microEEG (a novel miniaturized, FDA approved EEG device) to prospectively investigate the cerebral electrical activity of infants with Apnea, Bradycardia and Desaturation events. This project will also assess the feasibility of using the microEEG device in the Neonatal Intensive Care Unit (NICU) setting and the feasibility of remote centralized interpretation in this setting.

FFR-guided PCI has been performed in National Taiwan University Hospital(NTUH) for many years. Nevertheless, the method of FFR measurement in NTUH is different from that in literature. In this study, the investigator would like to evaluate the effectiveness and safety of NTUH experience in FFR prospectively. First, the investigator will record any intracoronary (IC) injected adenosine-related complications, such as bradyarrhythmia or chest discomfort. Second, the investigator will follow up on the clinical outcome of the participants for 2 years, record if any target lesion failure, target vessel failure, target vessel-related myocardial infarction, and cardiac death. Finally, left ventricular diastolic pressure, serum pro-brain natriuretic peptide (pro-BNP), and high sensitivity C- reactive protein (hsCRP) will be checked and determined their relationships with the maximum dosage of IC adenosine.

This pilot study is being pursued to observe whether certain medications are given to patients within a timeframe where their being given could play a part in a critical event in the management of the patient. There are general rules about when it would be appropriate for these types of medications not to be given. However, it is not current standard practice for the criteria to be put in place without the expressed wishes of the ordering physician or their agent. Research Question: Can the administration of cardio-depressant medications be documented as a significant risk factor for hypotensive or bradycardic events?