Preliminary clinical and hemodynamic results after mitral valve replacement using St. Jude Medical prostheses in comparison with the Björk-Shiley valve

The Thoracic and Cardiovascular Surgeon
D HorstkotteF Loogen

Abstract

The clinical improvement and the hemodynamic performance at rest and during bicycle exercise in 12 patients one year after St. Jude Medical mitral valve (SJMM) replacement were compared to the results of 40 patients after Björk-Shiley mitral valve (BSM) implantation. In both groups subjective and functional improvement was significant. In the SJMM-group no thromboembolic event had occurred, while 5 patients suffered from embolism during the first postoperative year after BSM (12.5%). Hemolysis was significantly lower in BSM but remained subclinical in SJMM. This may be explained by a premature backward movement of the posterior leaflet of the SJMM-prosthesis in late diastole resulting in a change of flow pattern. Low resistance to blood flow in the SJMM-prosthesis could be verified by a smaller diastolic transvalvular gradient (SJMM: 2.8 +/- 1.1; BSM: 5.3 +/- 2.6 mmHg). In valves with equal tissue annulus diameters (29 mm) the calculated effective valve orifices were significantly different (SJMM: 2.83 +/- 1.3 cm2; BSM: 1.85 +/- 0.53 cm2). In both groups the mean pulmonary artery pressure was significantly reduced at the time of reinvestigation but increased under exercise. Durability may become a problem because of the 2 movin...Continue Reading

Citations

Dec 1, 1995·The Annals of Thoracic Surgery·C W Akins
Nov 1, 1986·The Annals of Thoracic Surgery·J M DuncanP R Adams
Sep 1, 1984·Journal of the American College of Cardiology·I P PanidisJ Ross
Apr 27, 2010·The Annals of Thoracic Surgery·J Matthew TooleJohn S Ikonomidis
Jan 1, 1984·Scandinavian Journal of Thoracic and Cardiovascular Surgery·K RasmussenH Vejlsted
Jun 26, 1998·European Journal of Cardio-thoracic Surgery : Official Journal of the European Association for Cardio-thoracic Surgery·R A CesnjevarJ von der Emde

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.