Journals / Ankara Üniversitesi Veteriner Fakültesi Dergisi / 2003 / Cilt: 50 - Sayı: 1

Effects of norepinephrine on heart functions in rabbits with experimental hiperkalemia

Deneysel hiperkalemi oluşturulan tavşanlarda norepinefrinin kalp fonksiyonları üzerine etkileri

Pages
13–18
Publication Date
2022-10-12
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

In conclusion, in the treatment of hyperkalemia requiring urgent interventions due to cardiotoxic effects, norepinephrine may be used together with other therapeutic approaches to correct the serum potassium level.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study, 10 to 14 month-olds 12 (11 female and 1 male) New Zealand rabbits weighing 2-3 kg were used.
📊
Key Findings & Data:These animals were divided into two groups as "positive control" (n: 6) and "norepinephrine group" (n: 6).
💡
Conclusion & Impact:In conclusion, in the treatment of hyperkalemia requiring urgent interventions due to cardiotoxic effects, norepinephrine may be used together with other therapeutic approaches to correct the serum potassium level.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study, 10 to 14 month-olds 12 (11 female and 1 male) New Zealand rabbits weighing 2-3 kg were used. These animals were divided into two groups as "positive control" (n: 6) and "norepinephrine group" (n: 6). The animals in both groups were made hyperkalemic by administering 300 mM KC1 solution (prepared in 0.9% NaCl solution) via v. auricularis at 0.5 ml/kg/mi n for 15 minute. Norepinephrine was administered at 1.3 $mu$.g/kg/minute to the animals in the norepinephrine group after the 15Ul minute for 30 minutes. In order to measure serum potassium level, blood samples were collected from the animals of both groups, and for the first 45 minutes every 3 minutes and at 60 and 90th minutes, ECG recordings were taken. In the animals with hyperkalemia in the positive control group, the level of serum potassium peaked at 30th minute and then started to decrease; on the contrary, application of norepinephrine in the other group caused the level of potassium to decrease after 15th minute without reaching to the peak. It was determined that the typical signs of hyperkalemia including bradycardia, flattened P wave and widened QRS complex in ECG were corrected by the application of norepinephrine. In conclusion, in the treatment of hyperkalemia requiring urgent interventions due to cardiotoxic effects, norepinephrine may be used together with other therapeutic approaches to correct the serum potassium level.

Özet

Bu çalışmada, yaşlan 10-14 ay arasında değişen ve ortalama ağırlıkları 2-3 kg olan 11 dişi ve l erkek toplam 12 Yeni Zelanda tavşanı kullanıldı. Bu hayvanlar "pozitif kontrol" (n: 6) ve "norepinefrin grubu" (n: 6) olmak üzere iki gruba ayrıldı. Nor-epinefrin ve pozitif kontrol grubu tavşanlara, 300 m M konsantrasyondaki KC1 çözeltisi (izotonik NaCl içerisinde) 0.5 ml/kg/dk hızda 15 dk süre ile v. auricularis'den verilerek hiperkalemi oluşturuldu. Norepinefrin grubu hayvanlara 15. dk'dan sonra 1.3 $mu$g/kg/dk dozunda 30 dk süre ile norepinefrin infüzyon şeklinde verildi. Her iki gruba ait tüm tavşanlardan O, 15, 30, 60 ve 90. dk'larda serum potasyum düzeyini saptamak için kan alındı ve ilk 45 dk'lık sürede her 3 dk'da, 45. dk'dan sonra ise sadece 60. ve 90. dk'larda EKG çekimleri yapıldı. Deneysel oluşturulan hiperkalemili hayvanlardan pozitif kontrol grubunda serum potasyum düzeyi 30. dk'da pik noktaya ulaştı, daha sonra düşüşe geçti. Buna karşın, norepinefrin grubunda potasyum seviyesi pik noktaya ulaşmadan düşmeye başladı. Buna paralel olarak, hiperkaleminin tipik belirtileri olan bradikardi, EKG'deki P dalgasının düzleşmesi ve QRS kompleksindeki genişlemenin norepinefrin uygulaması ile deney öncesi değerlerine yaklaştığı saptandı. Sonuç olarak, kardiyotoksik etkisi ile kliniklerde acil müdahale gerektiren hiperkaleminin sağaltımında, norepinefrinin diğer tedavilerle birlikte uygulanabileceği kanısına varıldı.

🔖

Cite This Article

DURGUT, R., ÇELİK, S., BAL, R. (2022). Effects of norepinephrine on heart functions in rabbits with experimental hiperkalemia. Ankara Üniversitesi Veteriner Fakültesi Dergisi, Cilt: 50 - Sayı: 1, 13–18. https://ajindex.com/articles/445283

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (2)

  1. Bal R, Janahmadi M, Green GG, Sanders DJ (2001): Two kinds of transient outward currents, I(A) and I(Adepol), in F76 and Dİ soma membranes of the subesophageal ganglia of Helix aspersa. J Membr Biol, 179, 71 -78. 2.Bal R, Oertel D (2001): Potassium-currents in octopus cells of the mammalian cochlear nucleus. J Neurophysiol, 86,2299-2311. 3.Chevet D (1998): Hyperkalemia. Rev Prat, 48, 451 -456. 4.Choate JK, Nandhabalan M, Paterson DJ (2001). Raised extracellular potassium attenuates the sympathetic modulation of sino-atrial node pacemaking in the isolated gu­inea-pig atria. Exp Physiol, 86,1.19-25. 5.Darbar D, Smith M, Morike K, Roden DM (1996): Epinephrine-induced changes in serum potassium and cardiac repolarization and effects of pretreatment with propranolol and diltiazem. Am J Cardiol, 77, 1351-1355. 6.Dominguez OJ (2001): Hyperkalemia. Emerg Med Serv, 30,86-102. 7.Edwards NJ (1987): Button's Handbook of Canine and Feline ElectrocardiograpHy. Second Edition.
  2. WB Saunders, Philadelphia. 8.Hummel A, Chauveau D (2001): Hyperkalemia. Etiology, physiopathology, diagnosis, treatment. Rev Prat, 51, 667- 673. 9.Jolly SR, Keaton N, Movahed A, Rose GC, Reeves WC (1991): Effect of hyperkalemia on myocardial depression by verapamil. Am Heart J, 121, 517-523. 10.Kuvin JT (1998): Images in clinical medicine. Electrocardiographic changes of hyperkalemia. N Engl J Med,338,662. 11.Laurence DR, Bennett PN (1987): Clinical Pharmacology. 6th edition. Longman Singapore Publishers, Singapore. 12.Mattu A, Brady WJ, Robinson DA (2000): Electrocardiographic ' manifestations of hyperkalemia: Am J Emerg Med, 18, 721-729. 13.Mehta NJ, Chhabra VK, Khan IA (2001): Sinus arrest or sinoventricular conduction in mild hyperkalemia. J Emerg Med, 20, 163-164. 14.O'Neill M, Paterson DJ (1995): Role of the sympathetic nervous system in cardiac performance during hyperkalaemia in pig. Acta Physiol Scand, 153, 1-11. 15.O'Neill M, Sears CE, Paterson DJ (1997): Interactive ef­fects of K+, acid, norepinephrine, and ischemia on the heart: implications for exercise. J Appl Physiol, 82, 1046- 1052. 16.Pantanowitz L (2002): Drug-induced hyperkalemia. Am J Med, 112, 334-335. 17.Paterson DJ, Rogers J, Powell T, Brown HF (1993): Ef­ fect of catecholamines on the ventricular myocyte action potential in raised extracellular potassium. Acta Physiol Scand, 148, 177-186. 18.Perazella MA, Mahnensmith RL (1997): Hyperkalemia in the elderly: drugs exacerbate impaired potassium homeostasis. J Gen Intern Med 1