…P. When ACE is inhibited, the resulting accumulation of these peptides irritates afferent neural pathways in the respiratory tract. This process is not dose dependent…

…the separate quick reference for dosing in impaired renal function. Respiratory tract Diagnosis Agent Dose Duration : : : : Pneumonia, non severe (DS CRB65 0–1) phenoxymethylpenicillin 1…

…that make a seal impossible. Recent surgery on the oesophagus or upper gastrointestinal tract, ileus and ongoing upper gastrointestinal bleeding. Marked agitation or inability to…

…former smokers over 40 with respiratory symptoms, and occupational exposure to dust, gas or fumes. Preoperative assessment before thoracic or upper abdominal surgery in a…

…ulcer bleeding are managed differently from the first minute. Peptic ulcer remains the commonest cause of upper gastrointestinal bleeding, but the differential diagnosis includes oesophagitis…

Cardiology Respiratory medicine Definition and Pathophysiology Pulmonary hypertension (PH) is a heterogeneous pathophysiological disorder characterized primarily by elevation of pulmonary arterial pressure. It may arise…

…oxygenation despite maximal oxygen or non invasive ventilation. Inadequate ventilation with a rising pCO₂ and respiratory acidosis, or a markedly increased work of breathing with…

…heaviness, burning, or discomfort in the chest and may extend to the arms, shoulders, neck, jaw, upper back, abdomen, or epigastrium. Dyspnoea, nausea, vomiting, diaphoresis…

…Myocardial injury Myocardial injury is a biochemical diagnosis defined by at least one cardiac troponin value above the assay specific 99th percentile upper reference limit…

…food allergies, insect stings, and drug induced reactions. Approximately 90% of anaphylactic cardiac arrests present with pulseless electrical activity (PEA) as the initial rhythm, while…

Procedurer Almost all the complications of pleural aspiration arise from two errors: the needle is placed in the wrong site, and too much is drained…

…also I and aVF). Arrhythmias Sinus tachycardia Sinus tachycardia exists if the heart rate is higher than the upper normal limit. Sinus tachycardia can exceed…

…female Normal <440 ms <430 ms <450 ms Upper limit 440–460 ms 430–450 ms 450–470 ms Prolonged 460 ms 450 ms 470…

…pathophysiology Acute limb ischaemia (ALI) is an abrupt reduction in arterial perfusion of an upper or lower limb that causes tissue metabolic requirements to exceed…

…presented in the parenthesis). Values without confidence interval are simply the 98 th percentile (i.e the upper reference limit). Age <1 day 1–3…

…arms, neck, jaw, upper back, and abdomen, as well as dyspnea and nausea (anginal equivalents) [7]. Clinicians must consider both cardiac and non cardiac etiologies…

…palpitations, back pain and selected cases of upper abdominal pain. An ECG recording costs approximately $10 (10€) and may reduce morbidity and mortality substantially in…

…presented in the parenthesis). Values without confidence interval are simply the 98 th percentile (i.e the upper reference limit). Age <1 day 1–3…

…evident, ventricular tachycardia may appear more polymorphic in one lead (the upper lead). ECG 2 . Although the signal in the upper lead appears very disorganized…

…again within a day, and the abscess sits somewhere that makes incision in the emergency department the wrong move — in the hand, in the medial…

…irrespective of sex Mid upper arm circumference Midpoint of the upper arm < 23 cm suggests undernutrition in adults Calf circumference Largest circumference < 31…

…no conversation Cuff width ≥ 40% of the upper arm circumference — a cuff that is too narrow gives a falsely high reading The cuff at heart…

… a higher threshold may be considered individually in ongoing ischaemia Upper gastrointestinal bleeding that has been stabilised 70 g/L — a more liberal strategy gives…

…2–5 a mixed pattern. Orders of magnitude that direct the work up ALT 50 × the upper limit of normal: paracetamol poisoning, ischaemic hepatitis ("shock…

…distinction supports a risk based approach because cardiovascular benefit from blood pressure reduction may also occur in selected people whose pressure is elevated but below…

…atrium is activated passively. The upper boundary of this circuit may be located either anterior or posterior to the superior vena cava. A critical area…

…myocardial injury, defined by an elevated cardiac troponin (cTn) value with at least one value above the 99th percentile upper reference limit (URL). The injury…

…myocardial injury, demonstrated by a rising and/or falling troponin pattern with at least one value above the assay specific 99th percentile upper reference limit;…

…injury. Myocardial injury Myocardial injury is defined by at least one cardiac troponin (cTn) concentration above the assay specific 99th percentile upper reference limit (URL)…

…explained below. The normal P wave contour on ECG The normal P wave (Figure 1, upper panel) is typically smooth, symmetric and positive. The P…

…electrodes more proximally (closer to the trunk): leg electrodes are placed proximally on the thighs and arm electrodes are placed proximally on the upper arm…

…diminishes, the PR interval becomes longer. The upper normal limit is 220 msec (0.22 sec). If the PR interval is greater than 220 msec…

…side with a dialysis fistula, lymphoedema after axillary clearance or a recently inserted venous port. Procedure 1. Arm pressure. Place the cuff on the upper…

…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…

…raised — the two decisions must never be conflated. There is no absolute upper age limit. Suitability is determined organ by organ in consultation between the…

…conjunctiva, cornea and anterior chamber. Note the pupil size, shape and reaction to light. A teardrop shaped or peaked pupil suggests perforation. Look for hyphaema…

…the reduction , together with the distal pulse and sensation throughout the arm. External rotation (the Hennepin technique). The patient lies supine or sits. The upper…

…urine stays acidic however much bicarbonate is given. Potassium replacement is not the management of a side effect; it is part of the treatment itself…

…The upper 99% limits of normal for corrected QT (QTc) values in the general population are 450 ms for men and 460 ms for women…

…established ASCVD, its potential reduction in non fatal myocardial infarction and ischaemic stroke must be weighed against clinically important gastrointestinal and intracranial bleeding. Evidence in…

…exertion. Discomfort in the arm, jaw, neck, or upper back. Chest discomfort triggered by emotional stress. Palpitations associated with physical activity, a large meal, emotional…

…decades, the management of type 2 diabetes mellitus (T2DM) and obesity was siloed, with clinicians focusing primarily on hemoglobin A1c (HbA1c) reduction, blood pressure, lipids…

…Meanwhile, deoxygenated blood in the superior vena cava (which returns blood from the head and upper limbs) also enters the right atrium. Oxygenated and deoxygenated…

…yields a positive P wave in lead II ( Figure 2 , right hand side). The P wave is always positive in lead II during sinus rhythm…

…More distal disease may cause foot symptoms, although lower extremity symptoms are much more common than upper extremity symptoms. The severity of symptoms should be…

…the true lumen Occlusion of a major epicardial artery or bypass graft Side branch occlusion or thrombus Disruption of collateral flow Distal embolization Stent thrombosis…

…LDL particles from the circulation. Statins also reduce production of apoB 100 containing lipoproteins and exert effects beyond LDL C reduction, including modulation of inflammation…

…chest pain is more easily provoked after a meal because food intake redistributes blood to the gastrointestinal tract which reduces blood availability in the heart…

…with cTnT. Normal values (reference values) URL (upper reference limit) : The URL is the upper normal limit of troponin in a normal (healthy) population. It…

…the upper threshold. Unstable angina pectoris (UA) if troponin levels are below the threshold (i.e normal). STE ACS (ST Elevation Acute Coronary Syndrome) : STE…

…define an upper reference limit . Any value above the upper reference limit is considered elevated (abnormal) and thus indicates myocardial necrosis. The upper reference limit…

…Meanwhile, deoxygenated blood in the superior vena cava (which returns blood from the head and upper limbs) also enters the right atrium. Oxygenated and deoxygenated…

…female Normal <440 ms <430 ms <450 ms Upper limit 440–460 ms 430–450 ms 450–470 ms Prolonged 460 ms 450 ms 470…

…troponin (hs cTn), with at least one value above the 99th percentile upper reference limit (URL) in the appropriate clinical context. Unstable Angina presents with…

…Causes of sinoatrial (SA) block The following conditions cause sinoatrial block: Sinus node dysfunction (SND) Perimyocarditis Acute myocardial infarction (or ischemia) Drug side effects (procainamide…

…the upper threshold. Unstable angina pectoris (UA) if troponin levels are below the threshold (i.e normal). STE ACS (ST Elevation Acute Coronary Syndrome) : STE…

…through the strip, without any relation to QRS complexes. P waves may occur on the ST T segment ( Figure 1 , upper panel). The atrial rate…

…rises rapidly with further volume increases. This is explained by the existence of an upper limit for ventricular compliance. The greater the left ventricular compliance…