Journals / Türk Kardiyoloji Derneği Arşivi / 2013 / Cilt: 41 - Sayı: 4

Current approach for the prosthesis patient mismatch

Hasta protez uyumsuzluğuna güncel yaklaşım

Pages
354–363
Publication Date
2022-11-05
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Preventive strategies to avoid VP- PM should be individualized according to the anticipated se- verity of VP-PM and of the patient s baseline risk profile.

📌 3 Key Takeaways

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Objective & Hypothesis:All prosthetic valves are at least mildly stenotic and have relatively high transvalvular pressure gradients that can be observed despite normal prosthesis function.
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Key Findings & Data:Valve prosthesis- patient mismatch (VP-PM) may occur due to mismatches of both parameters, the expected hemodynamic performance of the prosthesis and the cardiac output requirements of the patient, which are largely related to the body size at rest.
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Conclusion & Impact:Preventive strategies to avoid VP- PM should be individualized according to the anticipated se- verity of VP-PM and of the patient s baseline risk profile.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

All prosthetic valves are at least mildly stenotic and have relatively high transvalvular pressure gradients that can be observed despite normal prosthesis function. Such gradi- ents may be due to a mismatch between prosthesis effective orifice area (EOA) and patient s body size. Valve prosthesis- patient mismatch (VP-PM) may occur due to mismatches of both parameters, the expected hemodynamic performance of the prosthesis and the cardiac output requirements of the patient, which are largely related to the body size at rest. In other words, a prosthesis may be adequate for patients with a small body surface area (BSA) but might become obstruc- tive for patients with a large BSA. The only parameter that has proven to be consistently and realistically useful to predict and describe VP-PM is the effective orifice area index (EOAI). The projected EOAI was identified as the best parameter to predict the VP-PM occurrence after surgery. VP-PM has been known to be independently and significantly associated with clinical outcomes. Severe VP-PM has a significant impact on early and late mortality, whereas moderate VP-PM may have a significant effect on mortality only in vulnerable subsets of patients, and particularly in those with depressed LV systolic function. The surgeon s anticipation of VP-PM prior to surgery, and successfully implented preventive strategies can reduce the incidence of VP-PM. Preventive strategies to avoid VP- PM should be individualized according to the anticipated se- verity of VP-PM and of the patient s baseline risk profile.

Özet

Tüm protez kapaklar az da olsa hafif stenotiktirler. Ba- zen kapakların fonksiyonları normal olmasına rağmen nis- peten yüksek basınç farkları görülebilmektedir. Bu yüksek basınç farkları protezin etkin orifis alanı (EOA) ile hastanın vücut büyüklüğü arasındaki bir uyuşmazlıktan kaynaklanıyor olabilir. Mevcut protezin beklenen hemodinamik performan- sı ve hastanın kardiyak debi gereksinimi (istirahatte büyük ölçüde vücut büyüklüğü tarafından belirlenen) gibi paramet- relerdeki uyumsuzluk nedeniyle hasta protez uyumsuzluğu (HPU) gelişebilir. Başka bir ifadeyle, vücut yüzey alanı (VYA) küçük bir hasta için yeterli olabilecek bir protez, VYA büyük bir hasta için obstrüktif hale gelebilir. HPUyu öngörmede ve tanımlamada geçerli ve tutarlı olarak faydası kanıtlanmış tek parametre etkin orifis alanı endeksidir (EOAE). Tahmini (ön- görülen) EOAE ise, operasyon sonrası gelişebilecek HPUyu tahmin etmede kullanılabilecek en iyi parametre olarak tespit edilmiştir. HPUnun klinik olaylarla da anlamlı ve bağımsız olarak ilişkili olduğu bilinmektedir. Ciddi HPU, erken ve geç mortalite üzerinde önemli bir etkiye sahipken, orta HPU özel- likle azalmış sol ventrikül (SV) sistolik fonksiyonu olanlarda olmak üzere, sadece duyarlı bireylerde mortaliteyi etkile- mektedir. Ameliyat öncesi cerrahın uyumsuzluğu öngörebil- mesi ve önleyici stratejilerin başarıyla uygulanmasıyla HPU insidansı azaltılabilir. HPUyu önleyici yaklaşımlar, beklenen uyumsuzluk şiddetine ve hastanın bazal risk profiline göre bireyselleştirilmelidir.

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Cite This Article

BİÇER, A. Y., DEMİRBAĞ, R., KAYA, Z. (2022). Current approach for the prosthesis patient mismatch. Türk Kardiyoloji Derneği Arşivi, Cilt: 41 - Sayı: 4, 354–363. https://ajindex.com/articles/632960

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