Clinical Case Studies Week 1 (HTN,AF,HF) Flashcards
Reference range for potassium?
Reference Range: 3.5 – 5.0 mmol/L
Reference range for sodium
Reference range: 135 – 145 mmol/L
What mmol/L indicates a diabetic patient for 2 hour postprandial glucose challenge?
< 7.8 mmol/L indicate normal glucose
>7.8 and < 11.0 mmol/L indicate impaired glucose tolerance
> 11.1 mmol/L indicate diabetes is likely
Fasting blood glucose levels, what is the level for a diabetic patient?
A fasting blood sugar level less than (5.6 mmol/L) is normal.
A fasting blood sugar level from (5.6 to 6.9 mmol/L) is considered prediabetes.
If its higher than (7 mmol/L) or higher on two separate tests, you have diabetes
What is the glycosylated hemoglobin (HbA1c) test? What is the target?
Reflect average of your blood glucose level over the past 10–12 weeks (average life cycle for RBC)
Target: ≤53 mmol/mol or ≤7%
Total cholesterol, LDL cholesterol, HDL cholesterol, Triglycerides level target?
Total cholesterol < 5.5 mmol/L
LDL cholesterol <2 mmol/L
HDL cholesterol> 1.0 mmol/L
Triglycerides <1.7 mmol/L
Hypercholesterolaemia is defined as total cholesterol > 5.5 mmol/L
Hypertriglyceridaemia is defined as triglyceride level of > 1.7 mmol/L
What is the blood pressure readings for hypertension?
Systolic BP (pressure during ventricular contraction –> pumping) > 140 mmHg
Diastolic BP (pressure during ventricular filling / relaxation –>filling) > 90 mmHg
Adverse effects of ace inhibitors?
Hypotension (especially first dose effect)
Angioedema
Dry Cough (5-20% of patients)
Hyperkalaemia (especially in Type I Diabetes, and in patients with renal impairment).
Headache, facial flushing –> renal impairment, skin rashes, l
Dose of the following ace inhibitors for hypertension:
A) Ramipril
B) Perindopril
C) Lisinopril
D) Quinapril
E) Captopril
A)
Adult, oral 2.5 mg once daily, increase after 2–3 weeks to 5 mg if necessary. Maximum 10 mg daily in 1 or 2 doses.
B)
Perindopril arginine, adult, oral, start at 5 mg once daily. Maximum 10 mg once daily.
Perindopril erbumine: 4 to 8 mg orally, daily
C)
Adult, oral, initially 5–10 mg once daily; if necessary, increase at intervals of 2–4 weeks up to 20 mg once daily. Maximum 40 mg daily.
D)
Adult, oral, initially 5–10 mg once daily; increase at 4‑week intervals to 10–40 mg daily in 1 or 2 doses.
E)
Oral, initially 12.5 mg twice daily, increased at intervals of 2–4 weeks to 25–50 mg twice daily.
ARB and ACE inhibitors have the same drug interactions except for?
Lithium –> decreased excretion of Lithium and increased risk of lithium toxicity in Angiotensin Receptor Blockers (ARB)
Common and infrequent AE of ARB?
Common adverse effects
Dizziness, hyperkalaemia, headache.
dont use in pregnancy
Infrequent adverse effects
First dose orthostatic hypotension
Rash, diarrhoea, dyspepsia, muscle cramps
Insomnia, nasal congestion.
Doses of the following ARB (sartans) for hypertension:
A) Candersartan
B) Irbesartan
C) Olmesartan
D) Telmisartan
E) Valsartan
A)
Adult, oral, initially 8 mg once daily; usually 8–16 mg once daily; increase if necessary to 32 mg once daily.
B)
Adult, oral, usually 150 mg once daily; increase if necessary to 300 mg once daily.
C)
Oral, initially 20 mg once daily; after 8 weeks, increase if necessary to 40 mg once daily.
D)
Hypertension, oral, usually 40 mg once daily; increase if necessary to 80 mg once daily.
E)
Adult, oral, usually 80 mg once daily; increase if necessary to 160 mg once daily. Maximum 320 mg once daily
Common and infrequent/rare AE of CCB?
common AE
headache, flushing, peripheral oedema & palpitations (DHPs especially)
> gingival hyperplasia
> bradycardia (diltiazem, verapamil)
> constipation (verapamil)
infrequent/rare AE
Dyspepsia (DHPs especially)
AV block, hepatitis, development or worsening of heart failure (diltiazem, verapamil)
Diltiazem/verapamil with digoxin?
Increased digoxin concentration
Dihydropyridines/verapamil with hepatic enzyme inducers such as carbamazepine, phenobarbitone, phenytoin, rifampicin
Increase metabolism of dihyropyridines and verapamil –> reduce efficacy of dihydropyridines
Diltiazem with lithium
Increased risk of lithium neurotoxicity
What are the doses for the following CCB for hypertension:
A) Amlodipine
B) Nifedipine
C) Felodipine
D) Nimodipine
E) Diltiazem
F) Verapamil
A)
Adult, child >6 years: initially 2.5–5 mg once daily, increasing if necessary after at least 1–2 weeks to a maximum of 10 mg once daily.
B)
Controlled release tablet: initially 30 mg once daily, increase to a maximum of 90 mg once daily (angina) or 120 mg once daily (hypertension)
Conventional tablet: initially 10–20 mg twice daily, increase to 20–40 mg twice daily.
C)
Adult, oral, initially 5 mg once daily; maintenance dose 5–10 mg once daily; maximum dose 20 mg once daily
D)
Adult, oral 60 mg every 4 hours.
E)
Controlled release products, oral, initially 180–240 mg once daily; increase as required up to 360 mg once daily.
F)
Conventional tablet, adult, initially 80 mg 2 or 3 times daily; maintenance dose, 160 mg 2 or 3 times daily.
Controlled release tablet, adult, initially 120–180 mg once daily; usual maintenance dose 240 mg once daily; increase if necessary to a maximum of 240 mg twice daily. Give daily doses >240 mg in 2 doses.
What beta blockers to use in hypertension? When are they used? What is the dose used?
Not first line –> less effective than first line drugs in reducing risk of stroke. Useful in patients with both elevated BP and stable angina, and after myocardial infarction
- atenolol 25 to 100 mg orally, daily
- metoprolol tartrate 25 to 100 mg orally, twice daily.
Thiazide diuretic to reduce blood pressure? What dose? When to use?
Thiazide and thiazide-like diuretics are not recommended as first-line therapy in younger patients because they are associated with new-onset diabetes
> used as first-line therapy for uncomplicated elevated BP in patients over 65 years
> avoid in those with gout
- chlortalidone 12.5 to 25 mg orally, daily
- hydrochlorothiazide 12.5 to 50 mg orally, daily
- indapamide 1.25 to 2.5 mg orally, daily
- indapamide modified-release 1.5 mg orally, daily.
What to monitor patients taking ACE inhibitor/ARB therapy for?
Hypotension, kidney impairment and hyperkalaemia.
- A small rise in serum creatinine (up to 25%) or serum potassium (within the normal range) should not necessarily prompt dose reduction or cessation of the ACEI.
Normal serum creatinine range for males and female
For adult men (65.4 to 119.3 micromoles/L)
For adult women (52.2 to 91.9 micromoles/L)
What can DHP CCB cause?
Their vasodilatory action can cause peripheral oedema, if the peripheral oedema does not subside, it may be necessary to reduce the dose or stop therapy.
What is the aim to reduce BP to?
BP to below 140/90 mmHg
What antihypertensive drugs is safe to use in pregnancy? Include doses
labetalol
Adult, oral, initially 100 mg twice daily, increased each week according to response; maintenance 200–400 mg twice daily (maximum 2.4 g daily in 3 or 4 doses).
Nifedipine
initially 10–20 mg twice daily, increase to 20–40 mg twice daily.
CR tablet: initially 30 mg once daily, increase to a maximum of 90 mg once daily (angina) or 120 mg once daily (hypertension)
Methyldopa
Maintenance, 125–500 mg 2–4 times daily.
When used with other antihypertensives daily dose is usually 500 mg or less.
digoxin also safe to use in pregnancy
Non-pharmacological management of elevated blood pressure?
regular aerobic exercise (can reduce daytime BP by 3.2/2.7 mmHg)
reduction of alcohol intake
moderate sodium restriction
healthy eating
weight reduction in overweight patients (5 kg weight loss can reduce BP by 7/3 mmHg).
- Nonpharmacological strategies should continue even if drug therapy is started; they have a complementary effect on BP and improve cardiovascular outcomes beyond their effect on BP.
What is first line drugs used foor blood pressure?
Angiotensin converting enzyme inhibitors (ACEI), angiotensin II receptors blockers (ARB), dihydropyridine calcium channel blockers, and thiazide and thiazide-like diuretics are suitable first-line drugs for uncomplicated elevated BP
- Overall, these drug classes have similar efficacy in reducing BP.
Beta blockers are no longer recommended as first-line therapy in patients with uncomplicated elevated BP, why? When are they used?
They are less effective than the first-line drugs in reducing the risk of stroke. However, they have a clear place in the management of patients with heart failure with reduced ejection fraction (HFrEF) and patients with coronary heart disease.
Stepwise appproach to reducing blood pressure?
Patients commonly require two or more drugs to reach BP target
Start BP-lowering treatment with a single drug, usually at a low to moderate dose.
If the BP target has not been reached after 3 months of treatment, add a low dose of a second drug from a different class. This is usually more effective than increasing the dose of the initial drug.
If BP remains above the target and both drugs are well tolerated, increase the dose of one of the drugs incrementally to the maximum dose, then increase the dose of the second drug, if required.
- a thiazide or thiazide-like diuretic with an ACEI, ARB or beta blocker
- an ACEI or ARB with a calcium channel blocker
- a beta blocker with a dihydropyridine calcium channel blocker
- an ACEI or ARB with a dihydropyridine calcium channel blocker and a thiazide or thiazide-like diuretic.
Atrial fibrillation after this card…
How to prevent AF?
Weight loss
- >- 10% or BMI < 27
Effective BP control
Tight glycaemic and lipid control
- HbA1c
Limiting alcohol
Physical activity
Managing OSA (Obstructive sleep apnoea) with CPAP B-blockers and antiarrhythmics for post-op AF