- 0Oct 4, '07 by SA2BDOCTORI read that we should not administer dgoxin if HR is less than 60 and you should also check the pulse for one full minute. Why is that when..diogoxin is to increase your Heart contracility..why should it matter if HR is low.
I am not making a connection, please advise
- 35,289 Visits
- 0Oct 4, '07 by Nili927I found this in my Pharmacology book. It's not much but I hope it helps out!
Digoxin can slow the depolarization of the SA node and other areas of the atria that may be acting as pacemakers. Thus the glycosides such as digoxin directly slow conduction through the AV node (decreasing the ventricular rate) and increase the vagal action on the heart.
(Lilley, Linda Lane Lilley. Pharmacology and the Nursing Process, 4th Edition. Elsevier, 2004. 21.4.2).
- 2Oct 4, '07 by BoonersmomRNBecause while digoxin strengthens CONTRACTILITY( strength of pumping action) it also slows down the heart RATE(beats per minute). 2 different actions..hence you wouldnt give it if an apical pulse is less than 60..you'd throw your patient into bradycardia and now you have a WHOLE different set of problems. Make sense?Last edit by BoonersmomRN on Oct 4, '07
- 0Oct 5, '07 by agent66However... look at your patients trend, if they have been on it for years and their heartrate is always in the fifties, don't panic and don't hold it because they obviously tolerate the lower rate and need the drug. If unsure get a doctors orders for specific parameters as many cardiologists would rather the meds be given. Also with regards to the minute apical check, alot of patients on Dig are atrial fib patients so irregular heart rate so need to do a minute to be accurate. Hope this helps you out.
- 0Nov 14, '07 by David's HarpSorry to threadjack, but as a followup question:
How often are Dig levels drawn at your institutions?
Ours are done weekly, which seems to be not often enough to me. I caught one case a couple weeks ago where a pt had been on it for three weeks with no levels ever drawn! We drew it, and she was about 0.13 above therapeutic (invisible self-pat-on-back goes here...). Seems to me it ought to be done daily, or is it generally done weekly?
- 2Dec 19, '07 by NursingNursea little OT, but it's also good to know potassium levels when giving Dig...a pt is more prone to dig toxicity when serum K levels are low. Dig and K bind to the same receptor, so when k is low, more dig will bind to the cell.
Also, when K is too high, there will be less therapeutic value to the dig.
(for a much more detailed explaination- I got this info from Pharmacology for Nursing Care, Lehne)