Profesionales médicos

A continuación, se enumeran los ensayos clínicos actuales.

Filtra esta lista de estudios por sede, estado, etc.

1. Spontaneous Coronary Artery Dissection: Mechanistic Evaluation

   Rochester, Minn.

   The purpose of this study is to screen for unique or characteristic circulating peptides, hormonal biomarkers and circulating mRNA in patients who have experienced spontaneous coronary artery dissection (SCAD).

    

2. A Study to Analyze Association of Frequent Premature Ventricular Complex with Stroke or Transient Ischemic Attack

   Rochester, Minn.

   The purpose of this study is to verify that high Premature Ventricular Complex (PVC) burden is associated with increased risk of stroke and/or Transient Ischemic Attack (TIA), to examine outcomes such as stroke/TIA, atrial fibrillation/flutter, and all-cause mortality associated with PVCs, and to evaluate whether PVCs are associated with development of appendage dysfunction.

3. Angiographic and Psychosocial Evaluation of Peripartum vs. Non Peripartum Spontaneous Coronary Artery Dissection (SCAD

   Rochester, Minn.

   The purpose of this study is to determine differences in clinical and imaging presentation, in-hospital management and prognosis in peri-partum and non-peri-partum SCAD patients.

    

4. Prospective Identification of Long QT Syndrome in Fetal Life

   Rochester, Minn.

   The postnatal diagnosis of Long QT Syndrome (LQTS) is suggested by a prolonged QT interval on 12 lead electrocardiogram (ECG),a positive family history and/or characteristic arrhythmias and confirmed by genetic testing.  LQTS testing cannot be performed successfully before birth as   fetal ECG is not possible and direct measure of the fetal QT interval by magnetocardiography is limited. Genetic testing can be performed in utero, but there is risk to the pregnancy and the fetus. Although some fetuses present with arrhythmias easily recognized as LQTS (torsade des pointes (TdP) and/or 2° atrioventricular (AV) block, this is uncommon, occurring in <25% of fetal LQTS cases. Rather, the most common presentation of fetal LQTS is sinus bradycardia, a subtle rhythm disturbance that often is unappreciated to be abnormal. Consequently, the majority of LQTS cases are unsuspected and undiagnosed during fetal life, with dire consequences. For example, maternal medications commonly used during pregnancy can prolong the fetal QT interval and may provoke lethal fetal ventricular arrhythmias. But the most significant consequence is the missed opportunity for primary prevention of life threatening ventricular arrhythmias after birth because the infant is not suspected to have LQTS before birth. The over-arching goal of the study is to overcome the barriers to prenatal detection of LQTS. The investigators plan to do so by developing an algorithm using fetal heart rate (FHR) which will discriminate fetuses with or without LQTS. Immediate Goal: The investigators propose a multicenter pre-birth observational cohort study to develop a Fetal Heart Rate (FHR)/Gestational Age (GA) algorithm from a cohort of fetuses recruited from 13 national and international centers where one parent is known by prior genetic testing to have a mutation in one of the common LQTS genes: potassium voltage-gated channel subfamily Q member 1 (KCNQ1), potassium voltage-gated channel subfamily H member 2 (KCNH2), or sodium voltage-gated channel alpha subunit 5 (SCN5A). The investigators have chosen this population because 1) These mutations are the most common genetic causes of LQTS, and 2) Offspring will have high risk of LQTS as inheritance of these LQTS gene mutations is autosomal dominant. Thus, progeny of parents with a known mutation are at high (50%) risk of having the same parental LQTS mutation. The algorithm will be developed using FHR measured serially throughout pregnancy. All offspring will undergo postnatal genetic testing for the parental mutation as the gold standard for diagnosing the presence or absence of LQTS.

5. Peripheral Nerve Stimulation Therapy for Atrial Fibrillation

   Rochester, Minn.

   The purpose of this study is to determine and compare the safety and efficacy of transcutaneous afferent patterned stimulation (TAPS) and respiratory-gated auricular vagal afferent nerve stimulation (RAVANS) therapies for the reduction of paroxysmal atrial fibrillation (AF) burden.

6. A Study to Evaluate a Computerized Stethoscope called ©CompuSteth to Diagnose Heart Disease

   Rochester, Minn.

   The purpose of this study is to identify patients presenting to the echocardiogram laboratroy for routine clinically indicated echocardiography or to the cardiac catheterization laboratory for routine clinically indicated catheterization procedures. These patients will undergo a cardiac physical examination using the ( VoqX) stethoscope for the following 2 aims:

   1) Collect computerized auscultation data to train the ©VoqX device on how a variety of cardiac pathologies "sound", including normal heart sounds, aortic stenosis, and mitral valve disease, after identifying these cardiac pathologies using gold-standard testing with echocardiography or invasive cardiac catheterization.

   2)Prospectively determine the accuracy of the ©VoqX device as a tool to non-invasively screen for structural cardiac pathologies, by comparing the results in terms of structural cardiac pathologies ascertained from using the ©VoqX device with those derived from echocardiography or cardiac catheterization testing.

7. Predictive Role of Non-Invasive Glucose Assessment During Pregnancy

   Rochester, Minn.

   This study aims to determine the value of regular, non-invasive [glucose] LabClasp monitoring during pregnancy.

8. A Study of Heart Muscle Elasticity Measured by Echocardiography

   Rochester, Minn.

   The purpose of this study is to evaluate the possibility of using echocardiography to measure heart muscle elasticity in clinical practice.

9. A Study of Lung Ultrasound to Assess Extravascular Lung Water

   Rochester, Minn.

   The purpose of this study is to determine if lung ultrasound surface wave elastography (LUSWE) can accurately detect changes in lung elasticity (compliance) caused by the presence of extravascular lung water  (pulmonary edema).

10. His Bundle Pacing in Bradycardia and Heart Failure

    Rochester, Minn.

    Participants in this study will either have heart failure (HF) and are scheduled to undergo cardiac resynchronization therapy pacemaker (CRT-P) or cardiac resynchronization therapy defibrillator (CRT-D) implantation, or have atrioventricular (AV) block and are scheduled to undergo dual chamber pacemaker implantation. In this study additional heart rhythm measurements will be collected during the implant procedure to better understand how His bundle and/or parahisian pacing (HISP) effects electrical conduction in the hearts of patients with HF or AV block. The hypothesis is that His bundle or parahisian pacing (HISP) may normalize atrioventricular (AV) conduction with a narrow combination of the Q wave, R wave and S wave (QRS complex) in functional bundle branch block or conduction delay in patients with heart failure (HF).