Cokkinos D V, Demopoulos J N, Heimonas I T, Voridis E M
Chest. 1976 Jun;69(6):797-9. doi: 10.1378/chest.69.6.797.
Systolic time intervals (STIs) were measured in a patient with massive pericardial effusion and electrical alternans. The total electromechanical systole and the left ventricular ejection time (LVET) were significantly shorter in beats following the smaller QRS complexes, while the pre-ejection time (PEP) was longer and the ratio of PEP/LVET larger. This beat-to-beat difference in the STIs suggests than an alternation in left ventricular performance accompanied the electrical alternans. After evacuation of the pericardial fluid, electrical alternans and STI alternation disappeared.
在一名患有大量心包积液和电交替的患者中测量了收缩期时间间期（STIs）。在QRS波群较小的搏动中，总机电收缩期和左心室射血时间（LVET）显著缩短，而射血前期（PEP）较长，PEP/LVET比值较大。STIs的这种逐搏差异表明，电交替伴随着左心室功能的交替。心包积液引流后，电交替和STI交替消失。
