chronotropic action

CONCLUSION : GST exerted a negative chronotropic action and induced a delayed repolarization of pacemaker cells in SA nodes of rabbits .

结论：GST对家兔窦房结具有负性变时作用，并可延长复极化时程。

Effects of sinomenine on isoprenaline and calcium mediated positive chronotropic action

青藤碱对异丙肾上腺素、组胺及氯化钙正性频率作用的影响

MD also showed some positive chronotropic action , although this is much weaker than that of ISO .

MD也有一定的正性频率作用，但比ISO弱得多；

Conclusion Ana was shown to decrease the myocardial contractility and slow down the heart rate , denoting negative inotropic as well as negative chronotropic action .

结论Ana使离体大鼠心肌收缩力降低，心率减慢，表现出负性肌力和负性频率作用；

Intravenous injection of B-7601 produced the negative chronotropic and dromotropic action in rats .

静注B-7601大鼠心脏呈现负性频率作用和负性传导作用。