2012年4月11日 · Dromotropic and chronotropic both relies on SA/AV nodal action potential (Phase 0,3,4). I'm wondering why chronotropic relies on inward Na+ current during Phase 4, and why dromotropic relies on inward Ca++ current during Phase 0.

2011年6月7日 · Also, you can give someone something like atropine which is positively dromotrophic during PEA and HR will not increase, but it's possible to see increase electrical activity.