…transmission through the atrioventricular (AV) node, thereby interfering with the pathway that enables reentry tachyarrhythmias (AVNRT and AVRT). These arrhythmias rely on AV node transmission…

…Pharmacology & dosing Definition and therapeutic rationale Inclisiran is a liver directed small interfering RNA (siRNA) designed to reduce production of proprotein convertase subtilisin/kexin type…

Procedurer What determines the outcome of a central venous catheter insertion is decided before the needle goes in: the choice of site, the use of…

…the eGFR stages and albuminuria. Inflammation and infection Test Reference Comment : : : CRP < 3 mg/L Rises within 6–8 h, half life about 19…

…Sampling for a suspected sexually transmitted infection — although chlamydia and gonorrhoea can be tested on urine or a self taken vaginal sample without a speculum…

…choice) Slower, 20–30 min Intradermal (ID) Tuberculin (PPD), skin prick testing, a local anaesthetic weal, BCG Slow, local effect Contraindications Absolute: Infection, a wound…

Procedurer A corticosteroid injection into soft tissue gives rapid but time limited pain relief and rarely alters the natural history of the disease. In lateral…

…respond to maximal ACTH stimulation, and it is rarely the injection itself that determines whether the result can be interpreted. What decides that is whether…

…action 1 to 2 minutes Duration of action 10 to 30 minutes Delivery IV Dose Bolus injection : 5 to 15 mg every 5 to 15…

…and Clinical Role Invasive coronary angiography (ICA) is a catheter based investigation that visualizes the coronary arterial tree after selective intracoronary contrast injection under fluoroscopy…

…infection or gastroenteritis at home Double or triple the oral daily dose during the days of illness (the patient's sick day rules) Vomiting or…

…the samples are sent correctly. A corticosteroid must never be injected into a joint in which infection has not been excluded. Indications Acute monoarthritis in…

…transdermal Dose Injection IV: • 150 μg in 1 ml vial. Dilute with 10 ml of normal saline and give by slow injection over 5…

…Injection of contrast media into the ventricle will instead reveal that the apical portion of the left ventricle is dilated (hence the term apical ballooning…

…injection . 7. Stop the test in the event of bradycardia, bronchospasm, marked salivation or increasing weakness, and give atropine. 8. Monitor for at least 30…

…loosened or avulsed nail plate, or a damaged nail fold edge Nail avulsion and inspection of the nail bed, with suture of any nail bed…

…pain Practical points during titration: Give the injection slowly over at least a minute; a rapid injection causes nausea and a fall in blood pressure…

…skin, smell, injection marks, medication patches and trauma. Remove contaminated clothing and wash the skin after external exposure A low Glasgow Coma Scale is not…

…before the drug is eliminated. A flush should immediately follow the bolus injection to ensure rapid delivery to the central circulation. If the drug is…

…backscatter of the light signal. Imaging is therefore typically performed during contrast injection or another method of temporary blood displacement. OCT is particularly useful for…

…Exact mechanism is unknown. 100−200 mg slow iv injection. Rarely used. Glucagon Counteracts beta blockers. An antidote to beta blockers. 2–10 mg bolus…

…Infections are difficult to heal because the heart valves are not vascularized and therefore it is difficult for the immune system to reach the bacteria…

…Lathundar Key message Fever in a neutropenic patient is an emergency. Infection can progress rapidly, while the typical local signs of inflammation may be faint…

…will heal badly however neatly the suture is placed. The commonest cause of wound infection is retained contamination, not poor suture technique — and the commonest…

…accessory respiratory muscles or paradoxical abdominal breathing Impending muscle fatigue Respiratory rate above 25 to 30 per minute Increased risk of ventilatory failure New drowsiness…

…as carbohydrate administration. 3. Rapid identification of seizures, delirium tremens, infection, trauma and metabolic disturbance. 4. Monitoring at the appropriate level of care , with readiness…

…wrist, and tape to secure the hand. Positioning: the wrist extended about 30–45 degrees over the rolled towel, the hand secured with tape. Greater…

…low platelet counts, followed by compression. Infection in the skin overlying the puncture site. Previous pelvic irradiation on the intended side (yields fibrotic, unrepresentative marrow…

…work of breathing with impending exhaustion. Threatened airway obstruction: inhalation injury, anaphylaxis, deep neck infection, an expanding haematoma, facial trauma. An anticipated course requiring a…

…Suspected subarachnoid haemorrhage with a normal or non diagnostic CT. Suspected neuroborreliosis, neurosyphilis or another CNS infection. Suspected inflammatory disease: multiple sclerosis, Guillain–Barré syndrome…

…spread of infection A small or uncooperative child Movement causes injury Preparation and equipment Otoscopy: an otoscope with a charged battery and clean disposable specula…

…be given intravenously , at the same dose. Blood samples can be taken at insertion; a blood gas and electrolytes can be interpreted, but some laboratories…

…coagulopathy or thrombocytopenia Relative Ongoing anticoagulant treatment — plan the aspiration for the trough level or pause the drug according to local practice Relative Skin infection…

…wait for complete diagnostic certainty. Sepsis is defined as life threatening organ dysfunction caused by a dysregulated host response to infection. Clinically this usually corresponds…

…long acting beta 2 agonist (indacaterol) 36 hours Long acting antimuscarinic (tiotropium, umeclidinium, glycopyrronium) 36–48 hours Smoking 1 hour Vigorous physical exertion 30 minutes…

…Time to onset of action 10 30 minutes. Duration of action <4 hours. Delivery IV or IM. Dose Injections • IV: 10–40 mg every 4…

…Postoperative hypertension. Mechanism of action Combined beta adrenergic and alpha adrenergic blocker with rapid onset of action. Labetalol has less antihypertensive efficacy as compared with…

…in increased levels of circulating pro inflammatory cytokines that may cause plaque rupture (i.e the risk of atherosclerotic plaque rupture is increased during infections)…

…causally responsible. This distinction is important because AKI after a contrast study frequently occurs in patients with several simultaneous renal insults. Infection, hypovolaemia, cardiac dysfunction…

…abscess, a markedly unwell patient with fever and systemic upset, suspected necrotising soft tissue infection, a child who cannot tolerate the procedure while awake. Suspected…

…to a normoxic patient Temperature Treat fever and look for an underlying infection Swallowing Keep the patient nil by mouth until swallowing has been assessed…

…course (no more than 7 days) may be given to selected patients with an eGFR of 30 40 mL/min for lower urinary tract infection…

…individual assessment; certain tumour types are not a bar). Untreated generalised infection, or certain transmissible agents according to the current transmission risk assessment. In DCD…

…100 mg × 1 5–7 days Epiglottitis and other severe upper airway infection cefotaxime 1–2 g × 3 IV Depends on the diagnosis Always assess…

…suspected chemical injury the priorities are reversed: irrigate first , for at least 30 minutes, and measure the pH in the conjunctival sac before anything else…

…failure The insulin requirement falls . Reduce the dose and measure more frequently Acute illness and infection The insulin requirement rises, often despite a reduced food…

…ongoing soft tissue infection with systemic involvement. Relative: Condition Adaptation : : ABI 0.5–0.79 Reduced compression (20–30 mmHg) under vascular surgical supervision Diabetes…

…own laboratory uses before applying it. The D dimer is raised in pregnancy, malignancy, infection, surgery, trauma and old age. A positive value is not…

…stopped for small biopsies, but have diathermy or aluminium chloride available. Infection in the area to be biopsied. Hypersensitivity to local anaesthetics. Areas at high…

…sinus arrest, sick sinus syndrome with long pauses. Bradycardia in poisoning with a beta blocker, a calcium channel blocker or digitalis, while awaiting the antidote…

…heritable, drug associated, or associated with conditions such as systemic sclerosis, HIV infection, cirrhosis, and sickle cell disease. The classification also recognizes vasoreactivity subgroups among…

…acute coronary syndrome, tobacco abstinence has been associated with reductions in reinfarction of approximately 30–40% and in death of approximately 35–45%. In chronic…

…muscle disease or a personal or family history of muscle disorders Acute infection Renal or hepatic impairment Hypothyroidism Vitamin D deficiency Concomitant interacting medications The…

Procedurer The insertion itself is rarely the difficult part — it is the confirmation of the position that determines whether the tube is safe. A misplaced…

…in which the patient reaches hospital early. The benefit of both methods falls steeply with the time since ingestion, and both can harm the patient…

…straightforward: ultrasound to find the fluid, an insertion site in the left lower quadrant lateral to the rectus sheath, and a cell count plus albumin…

…varies widely and may involve intrinsic cardiac disease, extrinsic systemic conditions, or pharmacologic effects. Inflammatory heart disease, caused by infections (viral, bacterial, protozoal, fungal, parasitic)…

…A markedly raised GGT with the other tests normal is most often enzyme induction by alcohol or drugs and is often of no clinical significance…

…fatal infections, and because of cost. Evidence in acute coronary syndromes and recent myocardial infarction COLCOT The COLCOT trial enrolled 4745 patients within 30 days…

…heart disease is a complication of rheumatic fever, which is caused by streptococcal infections (group A Streptococcus ). Rheumatic heart disease can occur at any age…