Advertisement

Topics

Investigation of Heart Function in Patients With Heart Valve Defects

2014-08-27 03:59:40 | BioPortfolio

Summary

In this study researchers plan to perform a diagnostic test called transesophageal echocardiography in order to see and record the movement and function of the heart.

Transesophageal echocardiography is similar to an upper gastrointestinal endoscopy. Different views of the heart are taken by a small, flexible instrument positioned in the esophagus (the tube that connects the mouth to the stomach). This allows doctors to create a clear picture of the heart through the wall of the esophagus rather than from outside the body through the muscles, fat, and bones of the chest wall.

During transesophageal echocardiography pictures of the heart will be taken while patients rest and as patients receive a medication called dobutamine. Dobutamine is a medication that makes the heart beat stronger and faster, similar to what exercise does to the heart.

Researchers are particularly interested in studying patients with defects in the valves of the heart, especially aortic regurgitation and mitral regurgitation. Patients with these defects in the heart valves tend to develop abnormalities in the size and function of the left ventricle. The left ventricle is one of the four chambers of the heart responsible for ejecting blood out of the heart into the circulation. Researchers believe that by identifying changes in the function of heart muscle, they may be able to predict the occurrence of muscle damage due to the diseased valves.

The purpose of this study is to determine whether the function of heart muscle measured during dobutamine stress transesophageal echocardiography can predict the later development of problems in the function and size of the left ventricle.

Description

In this investigation, we propose to perform dobutamine stress transesophageal echocardiography in patients with aortic regurgitation and in patients with mitral regurgitation in order to assess myocardial contractile reserve. The purpose of the study is to determine whether the contractile reserve of the myocardium measured during dobutamine stress echocardiography is a predictor of the development of subsequent left ventricular dysfunction and left ventricular dilatation, as well as recovery of left ventricular function after surgery, in these patients.

Study Design

N/A

Conditions

Aortic Valve Insufficiency

Location

National Heart, Lung and Blood Institute (NHLBI)
Bethesda
Maryland
United States
20892

Status

Completed

Source

National Institutes of Health Clinical Center (CC)

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:59:40-0400

Clinical Trials [940 Associated Clinical Trials listed on BioPortfolio]

HAART 200 Aortic Valve Annuloplasty During Bicuspid Aortic Valve Reconstruction

The HAART 200 "Aortic Annuloplasty during Bicuspid Aortic Valve Reconstruction" Trial is a prospective, non-randomized, multi-center trial to evaluate the safety and effectiveness of the H...

Conservative Aortic Valve Surgery for Aortic Insufficiency and Aneurysms of the Aortic Root. CAVIAAR

The primary objective of the CAVIAAR study is to prove that aortic valve sparing is associated with a 50% increase of 3 years-survival rate without increased mortality or serious increased...

Aortic Valve Replacement With Trifecta(TM)

The purpose of this study is to confirm the clinical safety and effectiveness of the Trifecta valve.

Surgical Treatment of Aortic Stenosis With a Next Generation Surgical Aortic Valve

The purpose of this clinical investigation is to confirm that the safety and performance of the EDWARDS INTUITY Valve System.

Aortic Valve Replacement With Trifecta(TM)

To confirm the clinical safety and effectiveness of the Trifecta valve.

PubMed Articles [1833 Associated PubMed Articles listed on BioPortfolio]

Transcaval Valve-in-Valve-in-Valve Aortic Valve Replacement for Bioprosthetic Valve Degeneration.

A 74-year-old man presented with progressive dyspnea on exertion. History included peripheral arterial disease and coronary artery bypass grafting with aortic valve replacement 12 years ago. Subsequen...

Replacement of a Stenotic Quadricuspid Aortic Valve With a Sutureless Prosthesis.

Quadricuspid aortic valve (QAV) is a rare occurrence, usually presenting with insufficiency rather than stenosis. We report a case of aortic valve replacement in a septuagenarian with a stenotic QAV, ...

A novel catheter with retractable stent that can prevent aortic insufficiency during left ventricular assist.

Left ventricle (LV) assist, which refers to the use of a mini-pump or catheter implanted across the aortic valve connected to the pump, can promote myocardial recovery after left ventricle failure. Ho...

Aortic valve annuloplasty with the HAART geometric ring and ascending aorta replacement.

Approximately one-third of patients suffering from aortic insufficiency (AI) present also with an ascending aortic aneurysm. AI is most commonly due to a combination of sinotubular junction and annu...

Aortic Valve-in-Valve in Externally Mounted Bioprosthesis: A Safe Treatment Option for Bioprosthetic Structural Valve Dysfunction.

Aortic valve-in-valve implantation for prosthetic valve dysfunction is a good alternative to reoperative valve replacement. There are some limitations to this approach including the risk of coronary o...

Medical and Biotech [MESH] Definitions

Pathological condition characterized by the backflow of blood from the ASCENDING AORTA back into the LEFT VENTRICLE, leading to regurgitation. It is caused by diseases of the AORTIC VALVE or its surrounding tissue (aortic root).

The downward displacement of the cuspal or pointed end of the trileaflet AORTIC VALVE causing misalignment of the cusps. Severe valve distortion can cause leakage and allow the backflow of blood from the ASCENDING AORTA back into the LEFT VENTRICLE, leading to aortic regurgitation.

Surgical treatment for severe AORTIC VALVE STENOSIS. Transcatheter aortic valve replacement (TAVR) is used as an alternative option in patients who are deemed at high risk or inoperable for traditional open-heart surgery.

Cardiovascular manifestations of SYPHILIS, an infection of TREPONEMA PALLIDUM. In the late stage of syphilis, sometimes 20-30 years after the initial infection, damages are often seen in the blood vessels including the AORTA and the AORTIC VALVE. Clinical signs include syphilitic aortitis, aortic insufficiency, or aortic ANEURYSM.

A type of constriction that is caused by the presence of a fibrous ring (discrete type) below the AORTIC VALVE, anywhere between the aortic valve and the MITRAL VALVE. It is characterized by restricted outflow from the LEFT VENTRICLE into the AORTA.

More From BioPortfolio on "Investigation of Heart Function in Patients With Heart Valve Defects"

Advertisement
Quick Search
Advertisement
Advertisement

 

Relevant Topics

Cardiology
Cardiology is a specialty of internal medicine.  Cardiac electrophysiology : Study of the electrical properties and conduction diseases of the heart. Echocardiography : The use of ultrasound to study the mechanical function/physics of the h...

Cardiovascular disease (CVD)
Acute Coronary Syndromes (ACS) Blood Cardiovascular Dialysis Hypertension Stent Stroke Vascular Cardiovascular disease (CVD) includes all the diseases of the heart and circulation including coronary heart disease (angina...

Barrett's Esophagus
Barrett’s esophagus is a condition in which the tissue lining the esophagus—the muscular tube that carries food and liquids from the mouth to the stomach—is replaced by tissue that is similar to the intestinal lining. This process is ca...


Searches Linking to this Trial