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InterAtrial Shunt Device in diastolic heart failure.

08:00 EDT 7th September 2018 | BioPortfolio

Summary of "InterAtrial Shunt Device in diastolic heart failure."

All types of heart failure are associated with reduced cardiac output and/or increased left atrial (LA) pressure. In diastolic heart failure (heart failure with preserved ejection fraction [HFpEF]), the increased LA pressure plays a central role, leading to pulmonary venous hypertension (PVH) and increased pulmonary artery pressure. These pressure parameters are presumably decisive for the symptoms and mortally of heart failure, particularly of the diastolic form. This is the basis for treatment with an interarterial shunt to reduce LA pressure in patients with diastolic heart failure and PVH. At first glance, this appears paradoxical, since closure of an atrial septum defect serves to prevent increased pulmonary vascular resistance and paradoxical embolism. Prevention of increased pulmonary vascular resistance and paradoxical embolism is thus an essential aspect in the development of devices for establishing an interarterial shunt. Reports on the InterAtrial Shunt Device (IASD®) and the V‑Wave have been published, both of which can be implanted with a low risk and few complications. The V‑Wave device is equipped with a valve to prevent paradoxical embolisms. However, paradoxical embolisms were also not observed with the IASD®, and the valve of the V‑Wave exhibited considerable degenerative changes and valve closure. Hemodynamic and clinical data of patients with an IASD® or an open V‑Wave device demonstrated a sustained hemodynamic improvement. Physical performance capacity and quality of life were increased. Whether IASD® may be broadly applicable in patients with diastolic heart failure is currently under investigation. In selected highly symptomatic patients with diastolic heart failure and PVH, the IASD® is already in clinal use.

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This article was published in the following journal.

Name: Der Internist
ISSN: 1432-1289
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Medical and Biotech [MESH] Definitions

Heart failure caused by abnormal myocardial relaxation during DIASTOLE leading to defective cardiac filling.

A heterogeneous condition in which the heart is unable to pump out sufficient blood to meet the metabolic need of the body. Heart failure can be caused by structural defects, functional abnormalities (VENTRICULAR DYSFUNCTION), or a sudden overload beyond its capacity. Chronic heart failure is more common than acute heart failure which results from sudden insult to cardiac function, such as MYOCARDIAL INFARCTION.

Impaired or delayed impulse conduction between the right and left HEART ATRIA. Advanced interatrial blocks are often associated with arrhythmias (e.g., ATRIAL FLUTTER; and ATRIAL FIBRILLATION), direct conduction block via the Bachmann's bundle and concomitant left atrial enlargement. Syndrome of advanced interatrial block associated with SUPRAVENTRICULAR TACHYCARDIA is referred to as Bayes syndrome.

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Enlargement of the HEART, usually indicated by a cardiothoracic ratio above 0.50. Heart enlargement may involve the right, the left, or both HEART VENTRICLES or HEART ATRIA. Cardiomegaly is a nonspecific symptom seen in patients with chronic systolic heart failure (HEART FAILURE) or several forms of CARDIOMYOPATHIES.

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