Идёт набор NCT03895541

Noninvasive Elastography Evaluation of Myocardial Stiffness in Elderly Patients With Isolated Diastolic Heart Failure: New Diagnostic Tool?

Без фазы С лечением Cardiovascular Diseases in Old Age

Ориентир для пациента и семьи

Простыми словами

Автоматическая сводка по структурированным данным реестра. Она помогает сориентироваться, но не заменяет официальный протокол или оценку врача.

Что изучают: В протоколе указаны: SuperSonic image.
Кому может быть актуально: Состояния в реестре: Cardiovascular Diseases in Old Age. Базовые параметры: 60 лет — 80 лет · Все.
Что важно проверить: Возраст, диагноз и пол — только базовые ориентиры. Предыдущее лечение, анализы и другие обязательные условия указаны ниже в критериях участия.
Где проводится: Франция
Следующий шаг: Сохраните исследование, покажите его лечащему врачу и уточните актуальный статус у исследовательского центра. Расходы, документы и поездка →

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Обзор

The new approach propose in this protocol is based on ultrafast ultrasound and remote palpation of tissue by ultrasonic radiation pressure. Ultrafast ultrasound of biological tissues is based on an innovative ultrasound imaging approach that can image very fast soft tissue events at a rate of several thousands of frames per second and provide quantitative mapping of the elasticity of the tissues. This current project aims is to focus on myocardial rigidity in diastole to better assess the function of the heart failure.

Подробное описание

Diastolic heart failure or heart failure with preserved systolic function is the leading cause of heart failure in elderly subjects (more than 2/3 of heart failure in subjects over 60 years). Its main etiology is high blood pressure. Diagnosis of diastolic heart failure remains controversial in clinical practice. It is based on ultrasound and biological criteria. These are mainly acute edema of the lung for patients with preserved Ejection Fraction and high Brain Natriuretic Peptid. It is now recognized that the "primum movens" of this type of heart failure is the increase in myocardial stiffness secondary to left ventricular hypertrophy. The noninvasive evaluation of this parameter would allow a more accurate and reliable diagnosis since it does not depend on the loading conditions, unlike the heart failure and the trans-mitral Doppler). However, the absence of a non-invasive tool for the direct evaluation of diastolic (so-called passive) rigidity prevents the use of this diagnostic parameter. Investigators propose here to non-invasively evaluate the myocardial stiffness in the elderly patient with diastolic heart failure thanks to a new imaging tool using an innovative ultrasonic technology, the ultrafast-echo associated with its elastographic mode "ShearWave Imaging". Investigators have been working for several years in collaboration with the Langevin Institute on this technology, which has recently been validated on experimental models. Its principle is based on the creation of a shear wave from a standard ultrasound probe and the calculation of the velocity of this wave thanks to the very high temporal resolution of the ultrasound system, this speed being correlated to the myocardial rigidity. The human study was recently made possible by the development of a phased array probe with the ability to work with the elastography mode ("ShearWave Imaging").

Вмешательства

Диагностический тест SuperSonic image
3 examen performed assessed to compared evaluation type: Cardiac magnetic resonance imaging, standard ultrasound imaging and ultrafast imaging

Первичные конечные точки

Myocardial rigidity assessment [Срок оценки: Day 1]

Вторичные конечные точки (2)

Norms estimation of myocardial rigidity [Срок оценки: Day 1]
Safety of cardiac elastography [Срок оценки: Day 1]

Критерии участия

Global Inclusion Criteria:

Hospitalization in cardiology services for acute pulmonary edema during heart failure
Natriuretic peptide type B ≥35 pg/ml
Echocardiographic structural alteration

Specific Inclusion criteria

Group "preserved LVEF": Left ventricular Ejection Fraction ≥50%
Group "moderate alteration of LVEF": Left ventricular Ejection Fraction between 40% and 49%
Group "Systolic heart failure": Left ventricular Ejection Fraction< 40%

Global Exclusion Criteria: