Shoucri R M
Department of Mathematics and Computer Science, Royal Military College of Canada, Kingston, Ontario.
Jpn Heart J. 1993 Jul;34(4):403-17. doi: 10.1536/ihj.34.403.
This study presents new mathematical relations to link oxygen consumption to different areas under the end-systolic pressure-volume relation (ESPVR). The approach consists of approximating the relation between oxygen consumption and left ventricular pressure by a quadratic polynomial, and then relating the coefficients of the quadratic polynomial to different areas under the ESPVR. The procedure applies to both ejecting contraction and isovolumic contraction. The concept of external energy reserve, EER, is introduced and experimental data that corroborate the derived theoretical results are discussed. The clinical significance of the results obtained enhances the potential possibility of using ESPVR in clinical work.
本研究提出了新的数学关系，以将氧耗与收缩末期压力-容积关系（ESPVR）下的不同区域联系起来。该方法包括用二次多项式近似氧耗与左心室压力之间的关系，然后将二次多项式的系数与ESPVR下的不同区域联系起来。该程序适用于射血收缩期和等容收缩期。引入了外部能量储备（EER）的概念，并讨论了证实所推导理论结果的实验数据。所得结果的临床意义提高了在临床工作中使用ESPVR的潜在可能性。
