Camous J P, Baudouy M, Guarino L, Gibelin P, Patouraux G, Guiran J B
J Electrocardiol. 1980 Oct;13(4):353-7. doi: 10.1016/s0022-0736(80)80087-2.
Nodal conduction is usually studied by tracing the H1 H2 on function of A1 A2 curves. If one interpolates a PVC before A1, there is a decrease in H1 H2. This might be explained by an A1 H1 interval lengthening (delta A1 H1). This study was done on 14 consecutive patients in whom a PVC can be interpolated (blocked at the A-V junction). In the majority of these patients, there is a downward and a right hand shift in the curve after an interpolated PVC. On other hand, the curves representing the sum H1 H2 + delta A1 H1 on function of A1 A2 were shifted upward and to the right in 12 of the 14 patients. This indicates inhibition which manifests itself not only by an ERP increase but also by an A2 H2 increase.
结区传导通常通过追踪H1-H2随A1-A2曲线的变化来研究。如果在A1之前插入一个室性早搏（PVC），H1-H2会缩短。这可能是由于A1-H1间期延长（ΔA1-H1）所致。本研究对14例连续的患者进行，这些患者能够插入PVC（在房室交界区受阻）。在这些患者中的大多数，插入PVC后曲线向下和向右移位。另一方面，14例患者中有12例，代表H1-H2+ΔA1-H1随A1-A2变化的曲线向上和向右移位。这表明存在抑制，不仅表现为有效不应期（ERP）增加，还表现为A2-H2增加。
