Cardiovascular Flashcards
(45 cards)
Aldosterone Antagonists
Examples
- Spironolactone
- Eplerenone
Aldosterone Antagonists
MofA
Competitively bind to the aldosterone receptor, increasing sodium and water excretion, and potassium retention in distal convoluted tubules
Aldosterone Antagonists
Uses
- Ascites / oedema in liver cirrhosis –> 1st line = Spironolactone
- Congestive heart failure - in addition to Beta-blockers or ACE-I or ARB
- Primary hyperaldosteronism
Aldosterone Antagonists
Side effects
- Hyperkalaemia (leading to muscle weakness, arrhythmia)
- Spironolactone –> can cause gynaecomastia (enlargement of mans breast)
Aldosterone Antagonists
Contraindications
- Pregnancy or lactating women!!!
- Severe renal impairment
- Hyperkalaemia
- Addison’s disease
Aldosterone Antagonists
Interactions
- ACE-I’s and ARB’s - both increase serum potassium
- Potassium supplements
Alpha-blockers
Examples
- Doxazosin
- Tamulosin
Alpha-blockers
MofA
Block alpha-1 adrenoreceptors in smooth muscle, inducing relaxation
Causes vasodilation and reduced resistance to bladder outflow
Alpha-blockers
Uses
- Benign prostatic hyperplasia
- Resistant hypertension (only doxazosin)
Alpha-blockers
Side effects
- Postural hypertension
- Dizziness
- Tamsulosin –> 3 D’s (Dizziness, Drowsiness, Depression)
Alpha-blockers
Contraindications
- Existing postural hypertension
ACE-Inhibitors
Examples
End in PRIL
- Ramipril
- Lisinopril
- Enalapril
- Perindopril
- Trandolapril
ACE-Inhibitors
MofA
Block ACE, so prevent the conversion of angiotension 1 to angiotensin 2, lowering the peripheral vascular resistance - especially the efferent glomerular arteriole
Also block breakdown of bradykinin
ACE-Inhibitors
Uses
- 1st line for hypertension
- 1st line for chronic heart failure
- Ischaemic heart disease
- Diabetic nephropathy and CKD with proteinuria
ACE-Inhibitors
Side effects
- Hypotension
- Cough (due to increased bradykinin)
- Hyperkalaemia
- Angioedema
- Acute renal failure (if excess ACE-I given)
ACE-Inhibitors
Contraindications
- Renal artery stenosis
- AKI
- Pregnancy !!!
ACE-Inhibitors
Interactions
- Potassium supplements
- Potassium sparing diuretics
- Combining with NSAID’s increases risk of renal failure
Angiotensin receptor blockers
Examples
End in SARTAN
- Candesartan
- Losartan
- Valsartan
- Irbesartan
- Telmisartan
Angiotensin receptor blockers
MofA
- Block action of angiotensin 2 on the AT1 receptor
- Reduces peripheral vascular resistance
- Reduces aldosterone levels –> promoting sodium and water excretion, helping reduce venous preload –> HF
Angiotensin receptor blockers
Uses
- 2nd line for hypertension
- 2nd line for chronic heart failure
- Ischaemic heart disease
- Diabetic nephropathy and CKD with proteinuria
Angiotensin receptor blockers
Side effects
- Hypotension
- Hyperkalaemia
- Renal failure - people most at risk have renal artery stenosis and rely on constriction of the efferent arterioles to maintain glomerular filtration
(NOTE - no angioedema and cough - so may be preferred to ACI-inhibitors)
Angiotensin receptor blockers
Contraindications
- Renal artery stenosis
- AKI
- Pregnancy !!!
Angiotensin receptor blockers
Interactions
- Potassium supplements
- Potassium sparing diuretics
- Combining with NSAID’s increases risk of renal failure
Beta Blockers
Examples
A lot end in OLOL
B1 = Heart:
- Bisoprolol
- Metoprolol
Middle:
- Atenolol
B1/B2 = Lungs (non-selective):
- Propanolol
- Nadolol
- Carvedillol