Wave intensity analysis of left atrial mechanics and energetics in anesthetized dogs
作者： Tracy N. Hobson , Jacqueline A. Flewitt , Israel Belenkie , John V. Tyberg
DOI: 10.1152/AJPHEART.00837.2006
关键词:
摘要: The left atrium (LA) acts as a booster pump during late diastole, generating the Doppler transmitral A wave and contributing incrementally to ventricular (LV) filling. However, after volume loading in certain disease states, LA contraction fills LV less effectively, retrograde flow (i.e., Ar wave) into pulmonary veins increases. purpose of this study was provide an energetic analysis clarify mechanisms responsible for changes forward backward flow. Wave intensity performed at mitral valve vein orifice. As operative stiffness increased with progressive loading, reflection coefficient energy reflected wave/energy incident also increased. This decelerated movement blood through transmitted LA, accelerating veins. Although total work hydraulic decreased Thus due accounts decrease increase measured by Doppler.
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