鉴于心室收缩是收缩着的心脏的主要功能部分,心脏工作的时相分析则是将心搏周期分为几个阶段。时相分析具有重要意义的原因在于它可以评价各种生理或病理情况下心脏功能的相适性。材料和方法用18头体重75至120公斤的小牛作了研究。切除自然心脏后对她们植入三种不同结构的人工心脏:两种没有心房和一种有被动心房。研究过程中记录下列参数:主动脉压、左心房压和左心气室压;以及肺动脉压、右心房压和右心气室压,还记录相应的脉冲,其前沿相应于心电图的Q波。在对自然心脏作时相分析时,根据心音 Since ventricular contraction is a major part of the contracting heart, the phase analysis of cardiac work divides the heart cycle into several phases. The reason that phase analysis is important is that it evaluates the fitness of cardiac function in a variety of physiological or pathological conditions. Materials and Methods 18 heads of calves weighing 75 to 120 kg were used. After removing the natural heart implanted them three different artificial heart structure: two without atrium and one with a passive atrium. During the study, the following parameters were recorded: aortic pressure, left atrial pressure and left ventricular pressure; and pulmonary arterial pressure, right atrial pressure and right ventricular pressure, and the corresponding pulses were also recorded with a leading edge corresponding to the Q wave of the electrocardiogram. In the heart of the natural phase analysis, according to heart sounds