| 1. | Activation of the heart normally begins in the sinoatrial node .
在正常情况下，心脏的活动始于窦房结。 |
| 2. | The sinoatrial node is located at the junction of the superior vena cava and the right atrium .
窦房结位于上腔静脉与右心房的交界处。 |
| 3. | These cell clusters in the central part of the sinus node are all around the sinus node artery .
窦房结中心区的细胞集落，全都存在于窦房结动脉周围。 |
| 4. | Purkinje fibers are driven ("over driven") by the sinus node at twice their intrinsic rate .
浦氏纤维是被较其本身频率约高一倍的窦房结所驱动（“超速驱动”）。 |
| 5. | This is particularly important when the conducting tissues between the sa node and the ventricles fail only from time to time .
尤其在窦房结和心房之间的传导组织有时发生故障时这点尤为重要。 |
| 6. | Comparative studies between the sinus node and the atrioventricular node have revealed relatively few histological differences .
对窦房结和房室结进行比较研究表明，它们在组织学上只有少许差异。 |
| 7. | An increase in extracellular potassium does in fact shift the pacemaker within the sinus node from the cephalic to the caudal portion .
细胞外液钾的增高确实能使窦房结内的起博点从头侧移向尾侧。 |
| 8. | An "atrially triggered" pacemaker can pick up the signals directly from the sa node and strengthen them before passing them to the ventricles .
一种“心房触发式心博器”就能从窦房结直接接收这种信号，并在传送到心房去之前还能将这种信号进行放大。 |
| 9. | Effect of exhaustive exercise on microstructure of sinoatrial node of rats
力竭运动对大鼠窦房结显微结构的影响 |
| 10. | Sa node pacema ker potential
窦房结起搏电位 |
