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Adenosine: Administration Technique, Dose Escalation and Precautions

…typically affect conduction in normal accessory pathways. However, conduction may be blocked in unusual accessory pathways that possess long conduction times or decremental conduction properties…

Adenosine for tachyarrhythmias (AVNRT, AVRT, NCT)

…pre excited atrial fibrillation (i.e. atrial fibrillation with impulses conducted via an accessory pathway [see Wolff Parkinson White Syndrome]); blocking AV node conduction may…

Atrioventricular nodal reentry tachycardia (AVNRT): ECG features & management

…node" instead of "nodal". AVNRT should not be confused with AVRT, which is the result of pre excitation (accessory pathway). AVNRT is caused by reentry…

Pre-excitation, Atrioventricular Reentrant (Reentry) Tachycardia (AVRT), Wolff-Parkinson-White (WPW) syndrome

…Click to zoom. Atrioventricular reentrant (reentry) tachycardia (AVRT) Individuals with accessory pathways are at risk of developing atrioventricular reentrant tachycardia (AVRT). This is a rapid…

Acute exacerbation of COPD: quick reference

…to speak in full sentences Marked work of breathing Use of accessory respiratory muscles or paradoxical abdominal breathing Impending muscle fatigue Respiratory rate above 25…

Acute severe asthma in adults: quick reference

…PEF or FEV1 if the patient can manage it without delaying treatment. 10. Call anaesthetics and intensive care early with life threatening features or an…

Skin biopsy — punch, shave and excision

…lymphoma or granulomatous disease. A treatment resistant rash without a definite diagnosis. Choice of technique Diagnostic question Method Comment : : : Pigmented lesion, suspected melanoma Excision with…

Atrial Fibrillation in the Critically Ill Patient

…ischaemic electrocardiographic changes during rapid AF. ST segment depression or T wave inversion can occur without coronary artery disease. Proposed explanations in the source material…

ECG changes caused by antiarrhythmic drugs, beta blockers & calcium channel blockers

…AVNRT, AVRT (WPW syndrome) and other conditions involving an accessory pathway. Paroxysmal atrial fibrillation in patients with severe symptoms, provided that first line therapies have…

The PR Interval & PR segment

…two are electrically isolated from each other by the fibrous rings ( anulus fibrosus). However, some people have an additional (also called accessory) connection between the…

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