Pharmacology Flashcards
Symptomatic treatment of congestion in heart failure
Diuretics (usually loop)
1st line pharmacological treatment of heart failure
ACE inhibitors and Beta Blocker therapy
Low dose and slow uptitration
Pharmacological management of heart failure
a. First line: ACE inhibitors and beta blocker therapy
Low dose and slow uptitration
b. Aldosterone antagonists
c. ACE-I intolerant: Angiotensin receptor blocker
d. ACE-I and ARB intolerant: Hydralazine/nitrate combination
e. Consider digoxin or ivabradine
What is ANP and BNP
Atrial natriuretic peptide - atria
B-(brain) natriuretic peptide - ventricles
What causes release of natriuretic peptide hormones
Stretching of atrial and ventricular muscle cells
Raised atrial or ventricular pressures
Volume overload
Main effects of natriuretic peptide hormones
Increase renal excretion of sodium (natriuresis) and water (diuresis)
Relax vascular smooth muscle (except efferent arterioles of renal glomeruli)
Increased vascular permeability
Inhibit the release or actions of:
Aldosterone, angiotensin II, endothelin, anti-diuretic hormone (ADH)
Counters RAAS
What metabolises cardiac natriuretic peptides
Neutral Endopeptidase (NEP, Neprilysin) NEP inhibition increases levels of natriuretic peptides
Example of Neprilysin inhibitor - how does it work
Sacubitril
Inhibits neutral endopeptidase, increasing levels if natriuretic peptides. NPs reduce pressure on heart
Example of angiotensin II blocker
Valsartan
Examples of beta-blockers in heart failure
Carvedilol
Bisoprolol
Metoprolol
Effects of nitrates
Arterial and venous dilators
Reduction of preload and afterload
Lower BP
Main uses of nitrates
Ischaemic heart disease (angina)
Heart failure
Examples of nitrates
Isosorbide mononitrate
GTN spray
GTN infusion
Describe chronic stable angina
Anginal chest pain Predictable Exertional Infrequent Stable
Describe unstable angina/acute coronary syndrome (NSTEMI)
Unpredictable
May be at rest
Frequent
Unstable
Describe ST elevation myocardial infarction
Unpredictable
Rest pain
Persistent
Unstable
Management of chronic stable angina
- Antiplatelet therapy
- Lipid-lowering therapy = Statins
- Short acting nitrate = GTN spray for acute atack
- FIRST LINE TREATMENT = Beta blocker or Calcium channel blocker
- If intolerant then switch
- If intolerant then combine
- If intolerant or uncontrolled, consider monotherapy or combinations:
Long acting nitrate
Ivabradine (inhibits If current)
Nicorandil (K channel activator)
Ranolazine (inhibits late inward sodium current)
Management of chronic stable angina. Examples of drugs for:
- Antiplatelet therapy
- Lipid-lowering therapy
- Short acting nitrate
- Antiplatelet therapy - Aspirin or Clopidogrel (if aspirin intolerant)
- Lipid-lowering therapy - Statins (simvastatin, atorvastatin)
- Short acting nitrate - GTN spray
Management of chronic stable angina: if intolerant to Beta blocker and Calcium channel blocker combined
Consider monotherapy or combinations with:
Long acting nitrate
Ivabradine (inhibits If current)
Nicorandil (K channel activator)
Ranolazine (inhibits late inward sodium current)
(Co-morbidities may determine which therapy)
*Management of acute coronary syndromes (NSTEMI and STEMI)
- Pain relief
- Dual antiplatelet therapy
- Antithrombin therapy
- Consider Glycoprotein IIb-IIIa inhibitor (high risk cases)
- Background angina therapy
- Lipid lowering therapy
- Therapy for LVSD/heart failure as required
Most patients will undergo invasive management with coronary angiography and revascularisation (angioplasty or CABG)
Management of acute coronary syndromes (NSTEMI and STEMI): Pain relief
GTN spray
Opiates - diamorphine
Management of acute coronary syndromes (NSTEMI and STEMI): Dual antiplatelet therapy
Aspirin
PLUS:
Ticagrelor or Prasugrel or Clopidogrel
Management of acute coronary syndromes (NSTEMI and STEMI): Antithrombin therapy
Fondaparinux
Management of acute coronary syndromes (NSTEMI and STEMI): Consider Glycoprotein IIb-IIIa inhibitor (high risk cases)
Tirofiban
Eptifibatide,
Abciximab
Management of acute coronary syndromes (NSTEMI and STEMI): Background angina therapy
Beta blocker
Long acting nitrate
Calcium channel blocker
Management of acute coronary syndromes (NSTEMI and STEMI): Lipid lowering therapy
Statins
Management of acute coronary syndromes (NSTEMI and STEMI): Therapy for LVSD/heart failure as required
ACE-inhibitor
Beta-blocker
Aldosterone antagonist
How can you classify antiarrhythmic drugs
Vaughan Williams classification
Describe the Vaughan Williams classification for anti-arrhythmic
Class I - sodium channel blockers
Class II - beta adrenoreceptor antagonists
Class III - Prolong the action potential
Class IV - Calcium channel blockers
Vaughan Williams classification: Subtypes/Examples of Class I anti-arrhythmics (sodium channel blockers)
Ia - disopyramide, quinidine, procainamide
Ib - lidocaine, mexilitene
Ic - flecainide, propafenone
Vaughan Williams classification: Examples of Class II anti-arrhythmics (beta-adrenoreceptor antagonists)
Propranolol, nadolol, carvedilol (non-selective)
Bisoprolol, metoprolol (β1-selective)
Examples of non-selective beta-adrenoreceptor antagonists
Propranolol, nadolol, carvedilol
Examples of β1-selective beta-adrenoreceptor antagonists
Bisoprolol
Metoprolol