Aldosterone Receptor Antagonist: Difference between revisions

(media)
 
(10 intermediate revisions by 2 users not shown)
Line 2: Line 2:


== Introduction ==
== Introduction ==
[[File:Diuretics.gif|thumb]]
[[File:Kidney and adrenal gland.jpeg|thumb|Kidney and adrenal gland]]
Aldosterone receptor antagonists (ARAs) are a type of diuretic used in patients with [[Heart Failure|CHF]]. They also have other properties that can prevent heart failure from becoming worse, along with improving symptoms of heart failure. These medicines cause the kidneys to get rid of extra water and they help to retain potassium by inhibiting secretion of potassium into distal tubule of the nephron<ref>Nagarajan V, Chamsi-Pasha M, Tang WH. The role of aldosterone receptor antagonists in the management of heart failure: an update. [Review]. Cleveland Clinic Journal of Medicine. 2012;79(9):631-9.</ref>. Because of this, they are called potassium-sparing diuretics.<ref>University of Michigan [https://www.uofmhealth.org/health-library/tx4152 Aldosterone Receptor Antagonists: Diuretics for Heart Failure] Available from: https://www.uofmhealth.org/health-library/tx4152 (last accessed 18.6.2019)</ref>
Aldosterone receptor antagonists are a class of drugs which block the effects of aldosterone. Aldosterone is the main mineralocorticoid [[Hormones|hormone]] in the body and is produced in the adrenal cortex of the [[Adrenal Glands|adrenal gland]].  


They have a high affinity for the aldosterone receptor in the kidneys<ref>Seawell MR, Al Darazi F, Farah V, Ramanathan KB, Newman KP, Bhattacharya SK, Weber KT. Mineralocorticoid receptor antagonism confers cardioprotection in heart failure. [Review].  Current Heart Failure Reports. 2013;10(1):36-45.</ref>. Blocking the aldosterone receptor prevents an increase in aldosterone, ultimately preventing changes to the cardiovascular system and allowing for increased water excretion. Aldosterone is a factor involved in cardiac hypertrophy and fibrosis and myocardial cell death thus has effects on myocardial remodelling. Evidence for a direct vascular effect of aldosterone suggests that this hormone may contribute to generalized vasoconstriction. Elevated plasma aldosterone levels can also contribute to depression of baroreflex sensitivity.<ref>Weber KT. [https://www.ncbi.nlm.nih.gov/pubmed/8682070 Aldosterone in congestive heart failure]. New England Journal of Medicine. 2001 Dec 6;345(23):1689-97. Available from: https://www.ncbi.nlm.nih.gov/pubmed/8682070 (last accessed 18.6.2019)</ref>
Aldosterone increases sodium reabsorption by the [[kidney]]<nowiki/>s, salivary glands, sweat glands and colon. At the same time, it increases the excretion of hydrogen and potassium ions.


Most aldosterone receptor antagonists are used in conjunction with other medications, specifically Beta Blockers and Ace Inhibitors.
Aldosterone receptor antagonists block the effects of aldosterone, preventing the the reabsorption of sodium, which encourages water loss. This leads to a decrease in [[Blood Pressure|blood pressure]] and a reduction in fluid around the [[Anatomy of the Human Heart|heart]].
{{#ev:youtube|https://www.youtube.com/watch?v=XrOcp5FFvbI|width}}<ref>Study Rx Aldosterone Receptor Antagonist - Spironolactone Available from: https://www.youtube.com/watch?v=XrOcp5FFvbI (last accessed 18.6.2019)</ref>


# Aldosterone receptor antagonists may be used in the treatment of [[Hypertension|high blood pressure]] or [[Heart Failure|heart failure]]. They also have a weak [[Diuretics|diuretic]] action.
# Aldosterone receptor antagonists have been shown to reduce heart failure-related hospitalisations, prolong life, and improve exercise tolerance and [[Quality of Life|quality of life]].<ref name=":1">Heart Failure Matters ALDOSTERONE RECEPTOR ANTAGONISTS OR MINERALOCORTICOID RECEPTOR ANTAGONIST (MRAS) Available:https://www.heartfailurematters.org/what-your-doctor-can-do/aldosterone-receptor-antagonists-or-mineralocorticoid-receptor-antagonist-mras/#animated-journey (accessed 7.4.2022)</ref>
This 2 minute video is a good introduction to Aldosterone receptor antagonists
{{#ev:youtube|v=4uU2ivM_dZU}}<ref>
UTMC Pharmacy. Aldosterone Receptor Antagonist . Available from: https://www.youtube.com/watch?v=4uU2ivM_dZU [last accessed 7.4.2022]</ref>
== Polypharmacy ==
Aldosterone receptor antagonists are proven to be beneficial in heart failure patients even if they are already on [[Angiotensin Inhibitors and Blockers for Treating Hypertension|angiotensin-converting enzyme (ACE) inhibitors]] or angiotensin II receptor blockers (ARBs).  <ref name=":1" />
== Common ARAs ==
== Common ARAs ==
Two common aldosterone receptor antagonists are<ref name=":0">Lainscak M, Pelliccia F, Rosano G, Vitale C, Schiariti M, Greco C, Speziale G, Gaudio C (2015). Safety profile of mineralocorticoid receptor antagonists: Spironolactone and eplerenone. Int J Cardiol. 200, 25-9</ref>
Two common aldosterone receptor antagonists are<ref name=":0">Lainscak M, Pelliccia F, Rosano G, Vitale C, Schiariti M, Greco C, Speziale G, Gaudio C (2015). Safety profile of mineralocorticoid receptor antagonists: Spironolactone and eplerenone. Int J Cardiol. 200, 25-9</ref>
Line 17: Line 25:


== Adverse Effects ==
== Adverse Effects ==
Due to the prevention of potassium secretion into the distal tubule both these drugs are associated with an adverse effect of  
Due to the prevention of potassium secretion into the distal tubule both these drugs are associated with an adverse effect of:
* Hyperkalemia due to them being potassium sparing diuretics.
* [[Hyperkalemia]] due to them being potassium sparing diuretics.


* Gynecomastia and breast pain in men because it tends to bind to progesterone and androgen receptors<ref name=":0" />.  
* Gynecomastia and breast pain in men because it tends to bind to progesterone and androgen receptors<ref name=":0" />. The newer drugs don’t have this effect<ref name=":1" />.


== Physiotherapy - Implications ==
== Physiotherapy - Implications ==
[[File:Heart rate monitor.jpg|right|frameless|150x150px]]
[[File:Angina.jpg|thumb|215x215px|Angina]]
This drug, while acting to relieve the body of excessive fluids, can inadvertently disrupt the electrolyte and pH balance in the system. Because the main side effect is hyperkalemia, Hyperkalemia affects the cardiac conductive tissue and can cause serious arrhythmias ( eg ventricular fibrilllation, asystolic arrest) Hence is it important to check for any irregular heartbeats if the patient begins complaining of chest pains or shortness of breath<ref>Sica DA. Diuretic-related side effects: development and treatment. J Clin Hypertens. 2004;6:532–540.</ref>.  
These drugs can sometimes affect kidney function and can also increase potassium levels (hyperkalemia). Hyperkalemia affects the cardiac conductive tissue and can cause serious [[Heart Arrhythmias|arrhythmias]] ( eg [[Ventricular Fibrillation|ventricular fibrillation]], [[Cardiac Arrest|asystolic arrest]]).  It important to check for any irregular heartbeats if the patient begins complaining of chest pains or [[Dyspnoea|shortness of breath]]<ref>Sica DA. Diuretic-related side effects: development and treatment. J Clin Hypertens. 2004;6:532–540.</ref>. This is especially important for patients who also use ACE inhibitors or ARBs.   


In addition to monitoring the patient’s vitals before, during and after treatment, patients should be educated on lifestyle changes to help decrease their mortality.
In addition to monitoring the patient’s [[Vital Signs|vitals]] before, during and after treatment, patients should be educated on lifestyle changes to help decrease their mortality.


== References ==
== References ==

Latest revision as of 02:49, 7 April 2022

Original Editor - Lauren Pulliam Southern Top Contributors - Lucinda hampton, Kim Jackson, Lauren Pulliam Southern and Beau Lawrence

Introduction[edit | edit source]

Kidney and adrenal gland

Aldosterone receptor antagonists are a class of drugs which block the effects of aldosterone. Aldosterone is the main mineralocorticoid hormone in the body and is produced in the adrenal cortex of the adrenal gland.

Aldosterone increases sodium reabsorption by the kidneys, salivary glands, sweat glands and colon. At the same time, it increases the excretion of hydrogen and potassium ions.

Aldosterone receptor antagonists block the effects of aldosterone, preventing the the reabsorption of sodium, which encourages water loss. This leads to a decrease in blood pressure and a reduction in fluid around the heart.

  1. Aldosterone receptor antagonists may be used in the treatment of high blood pressure or heart failure. They also have a weak diuretic action.
  2. Aldosterone receptor antagonists have been shown to reduce heart failure-related hospitalisations, prolong life, and improve exercise tolerance and quality of life.[1]

This 2 minute video is a good introduction to Aldosterone receptor antagonists

[2]

Polypharmacy[edit | edit source]

Aldosterone receptor antagonists are proven to be beneficial in heart failure patients even if they are already on angiotensin-converting enzyme (ACE) inhibitors or angiotensin II receptor blockers (ARBs).  [1]

Common ARAs[edit | edit source]

Two common aldosterone receptor antagonists are[3]

  • Spironolactone: taken orally with doses of 12.5-25 mg per day and has a long half-life of 13-17 hours[4].
  • Eplerenone is also taken orally with doses of 50 mg twice daily with a half-life of 4 hours[5] and both are excreted by via the liver and kidneys[6].

Adverse Effects[edit | edit source]

Due to the prevention of potassium secretion into the distal tubule both these drugs are associated with an adverse effect of:

  • Gynecomastia and breast pain in men because it tends to bind to progesterone and androgen receptors[3]. The newer drugs don’t have this effect[1].

Physiotherapy - Implications[edit | edit source]

Angina

These drugs can sometimes affect kidney function and can also increase potassium levels (hyperkalemia). Hyperkalemia affects the cardiac conductive tissue and can cause serious arrhythmias ( eg ventricular fibrillation, asystolic arrest). It important to check for any irregular heartbeats if the patient begins complaining of chest pains or shortness of breath[7]. This is especially important for patients who also use ACE inhibitors or ARBs.

In addition to monitoring the patient’s vitals before, during and after treatment, patients should be educated on lifestyle changes to help decrease their mortality.

References[edit | edit source]

  1. ↑ 1.0 1.1 1.2 Heart Failure Matters ALDOSTERONE RECEPTOR ANTAGONISTS OR MINERALOCORTICOID RECEPTOR ANTAGONIST (MRAS) Available:https://www.heartfailurematters.org/what-your-doctor-can-do/aldosterone-receptor-antagonists-or-mineralocorticoid-receptor-antagonist-mras/#animated-journey (accessed 7.4.2022)
  2. ↑ UTMC Pharmacy. Aldosterone Receptor Antagonist . Available from: https://www.youtube.com/watch?v=4uU2ivM_dZU [last accessed 7.4.2022]
  3. ↑ 3.0 3.1 Lainscak M, Pelliccia F, Rosano G, Vitale C, Schiariti M, Greco C, Speziale G, Gaudio C (2015). Safety profile of mineralocorticoid receptor antagonists: Spironolactone and eplerenone. Int J Cardiol. 200, 25-9
  4. ↑ U.S. Food and Drug Administration (FDA). Aldactone spironolactone tablets, USP. Available online at: https://www.accessdata.fda.gov/drugsatfda_docs/label/2008/012151s062lbl.pdf. Last accessed 11/29/18.
  5. ↑ U.S. Food and Drug Administration (FDA). INSPRA eplerenone tablets. Available online at: https://www.accessdata.fda.gov/drugsatfda_docs/label/2002/21437lbl.pdf. Last accessed 11/29/18.
  6. ↑ Nappi JM, Sieg A (2011). Aldosterone and aldosterone receptor antagonists in patients with chronic heart failure. Vasc Health Risk Manag. 7, 353-63.
  7. ↑ Sica DA. Diuretic-related side effects: development and treatment. J Clin Hypertens. 2004;6:532–540.
Retrieved from "https://www.physio-pedia.com/index.php?title=Aldosterone_Receptor_Antagonist&oldid=300207"