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16:48 Apr 9, 2020 |
English to Dutch translations [PRO] Medical - Medical: Cardiology | |||||||
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| Selected response from: Barend van Zadelhoff Netherlands Local time: 11:27 | ||||||
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Summary of answers provided | ||||
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3 | spieruitlopers van de atria |
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tongues of atrial muscle spieruitlopers van de atria Explanation: spieruitlopers van de voorkamers/atria in de pulmonaalvenen Hier worden ze 'sleeves' genoemd High-definition mapping in cardiale elektrofysiologie: op weg naar perfectie 20 jaar na de introductie van elektroanatomische mapping 2) Detectie van PV-potentialen. Door de betere signaal-tot-ruisratio is het RHYTHMIA HDx-systeem gevoeliger om (na partiële ablatie) residuele PVpotentialen van lage amplitude te detecteren13. Bovendien laat het systeem toe om voor het eerst in de geschiedenis van de EAMs de musculaire 'sleeves' (spieruitlopers van de voorkamers in de pulmonaalvenen) te visualiseren. Dit is belangrijk omdat op deze plaatsen voorkamerfibrillatie ontstaat. https://www.tvcjdc.be/nl/article/12908441/ Atrial Fibrillation Treatment Catheter Ablation of atrial fibrillation Ablation therapy (Pulmonary Vein Isolation, PVI) The pulmonary veins are vessels connecting the lungs to the left atrium that allow oxygen-enriched blood to return to the heart. Tongues of atrial muscle extend for a short distance (up to about 5 cm) from the body of the left atrium into the pulmonary veins. In people with atrial fibrillation, these muscle extensions have been found to exhibit electrical activity that is rapid and not controlled by the normal activity of the heart. These abnormal electrical discharges, as a result of complex interactions, produce rapid (400-650 per minute) and irregular electrical activity and correspondingly feeble mechanical contractions in the atria. The spread of abnormal electrical activity originating from the pulmonary veins can be stopped by irreversibly inactivating/killing the cells at the junction of the PVs with the left atrium so that they cannot conduct electrical signals. Inactivation of the cells at the junction of the PVs can be achieved by either heating the cells (to more than 55 degrees but below 80 - 90 degrees centigrade) or cooling the cells (to below -50 degrees centigrade) or by cardiac surgery. https://www.escardio.org/vgn-ext-templating/v/index.jsp?vgne... -------------------------------------------------- Note added at 1 hr (2020-04-09 18:11:28 GMT) -------------------------------------------------- Wat je in die zin zou kunnen doen: Tongues of atrial muscle extend for a short distance (up to about 5 cm) from the body of the left atrium into the pulmonary veins. Vanaf de spiermassa van het linker atrium zetten zich over een korte afstand (ongeveer 5 cm maximaal) uitlopers van atriaal spierweefsel voort in de pulmonaalvenen. -------------------------------------------------- Note added at 3 days 15 mins (2020-04-12 17:04:09 GMT) -------------------------------------------------- By the way, 'sleeves' is more common (71 G-hits) than 'tongues' (a few G-hits) See: https://tinyurl.com/udchv4j An individual example: The myocardial sleeves of the pulmonary veins: potential implications for atrial fibrillation. Atrial fibrillation (AF) is the most common abnormal heart rhythm and contributes to cardiac morbidity and mortality. Electrophysiological studies with pacing have shown that AF is initiated by ectopic beats localized in the pulmonary vein (PV) walls. The aim of this work was to look for some anatomical or histological particularities to explain these ectopic beats. Ten autopsied hearts were examined (6 males, 4 females). The myocardium was studied from the left atrium to the PV. Histological sections were made from 39 PVs. Myocardial cells were localized to PV between 9 and 38 mm from the PV-atrial junction. The sleeve was composed of circularly and longitudinally oriented bundles of cardiomyocytes. The peripheral end of the myocardial sleeve was irregular. The longest myocardial sleeves were found in the superior veins and were longitudinally oriented. At the PV-atrial junction, the circular bundles were not often circumferential. PV myocardial architecture confirmed the possibility of initiating AF. This fact is important for therapeutic radiofrequency ablation and explains why PV disconnection is essential. https://www.ncbi.nlm.nih.gov/pubmed/14872285 |
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