February 1, 1980CirculationOpen Access

Hemodynamic factors that affect calculated orifice areas in the mitral hancock xenograft valve.

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Population

40 isolated, normal functioning mitral Hancock valves

Design

Cohort

Authors

JUJosé L. Martínez UbagoUniversidad de Navarra AFA. FigueroaUniversity of the East Ramon Magsaysay Memorial Medical Center TCT ColmanRoyal Navy

Discussion

Member takes

Implication

Hancock valve EOA assessment requires flow-specific references; leaves open whether current thresholds warrant guideline revision.

Structured PICO

Population

40 isolated, normal functioning mitral Hancock valves (selected from a cohort of 175 restudied patients out of 605 patients who received Hancock valves between June 1974 and December 1978)

Intervention

Hemodynamic assessment including early, middle, and late diastolic mitral valve gradients measured by planimetry and corresponding flows estimated by angiography

Outcome

Instantaneous effective orifice area compared to theoretical openingsurrogate

The effective orifice area of mitral Hancock xenograft valves is flow-dependent and consistently smaller than the theoretical area, suggesting that specific nomograms are needed to accurately assess valve function over time.

Cite This Study

Ubago et al. (1980) studied this question.

synapsesocial.com/papers/6a7c6ec34993d89ffceadce2 https://doi.org/10.1161/01.cir.61.2.388

View Full Paper

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Bookmark

Hemodynamic factors that affect calculated orifice areas in the mitral hancock xenograft valve.

Discussion

Member takes

Implication

Structured PICO

Cite This Study

Hemodynamic factors that affect calculated orifice areas in the mitral hancock xenograft valve.

Discussion

Member takes

Implication

Structured PICO

Cite This Study

Also Consider

Also Consider