Key result
Laser profiling detects functional pericardial leaflet changes missed by conventional hydrodynamic testing.
Why the study?
Laser profiling techniques were applied to detect detailed leaflet motion patterns in bovine pericardial heart valves not identifiable by conventional hydrodynamic measurements.
Answers are grounded in this paper and cite their sources.
Laser profiling provides detailed functional dynamic assessment of prosthetic valve leaflets beyond conventional hydrodynamic measurements.
Laser profiling techniques have been used to examine the 2-dimensional and 3-dimensional patterns of leaflet motion in functioning bovine pericardial heart valves (1 normal valve and 1 fatigued/calcified). In the normal valve the general patterns of opening and closing were similar for all leaflets; however, localised variations such as areas of high curvature, retarded motion and high speed motion were identified. In the fatigued/calcified valve significant differences from the normal leaflet motion were observed e.g. increased crimping, gross leaflet lag and irregular deformation. The laser profiling technique was able to reveal changes in the functional dynamics of pericardial valve leaflets not otherwise detectable by conventional hydrodynamic measurements of valve performance.
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Donn et al. (1997) studied Bovine pericardial heart valves (n=2). Laser profiling techniques vs. Conventional hydrodynamic measurements was evaluated on 2-dimensional and 3-dimensional patterns of leaflet motion. Laser profiling techniques revealed changes in the functional dynamics of fatigued/calcified pericardial valve leaflets that were not detectable by conventional hydrodynamic measurements.
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