…the left ventricle. This type of bradycardia is due to diminished automaticity (pacemaker function) in the sinoatrial node or conduction defects (e.g. second degree…

Arrhythmias and arrhythmology Emergency medicine Pharmacology & dosing Definition and Pathophysiology Bradycardia encompasses a spectrum of rhythm disturbances characterized by an inappropriately slow heart rate. Within…

…guides the management of non acute or asymptomatic bradyarrhythmia. In patients presenting with intermittent symptoms of bradycardia, it is fundamental to establish a temporal correlation…

Arrhythmias and arrhythmology Critical care Pharmacology & dosing Definition and Pathophysiology Bradycardia and conduction disorders arise from dysfunction within the sinus node, the atrioventricular node (AVN…

ECG Myocardial ischemia and infarction Conduction defects caused by myocardial ischemia and infarction Bradycardia and conduction defects, such as bundle branch block, fascicular block and…

…and asystole. Bradyarrhythmias are discussed in the chapter Management of Bradycardia (Bradyarrhythmia). Initial rhythm and the course of arrhythmias during cardiac arrest The initial rhythm…

…after the tachycardia episode. Under certain circumstances, bradycardia can actually reduce conduction through the AV node, resulting in increased AV block. Sinus node dysfunction can…

…The conditions encircled by the term sinus node dysfunction are as follows: Sinus bradycardia (which in its purest form means that the automaticity is diminished)…

…bradycardia, SA block, sinus arrest, sick sinus syndrome, second degree or third degree AV block. An escape rhythm may be present in any bradycardia. Bradycardia…

…palsy — that can be assessed before and during the window of effect. The muscarinic effect may at the same time produce marked bradycardia and, rarely…

…pupils, an altered breathing pattern, a rising blood pressure with bradycardia. A known or suspected intracranial space occupying lesion with mass effect and midline shift…

…predictable error is forgetting that pacing hurts a great deal in a conscious patient. Indications Immediate (transcutaneous) pacing in bradycardia with haemodynamic compromise — hypotension, shock…

…Hallucinations. Hypotension. Bradycardia. AV block. Constipation Contra indications Bradycardia. Caution • Clonidine may induce severe hypotension. • Clonidine is not recommended in most patients with severe cardiovascular…

…bradycardia mild Tigan TRIMETHOBENZAMIDE HYDROCHLORIDE Trimethobenzamide Hydrochloride NA no no BICILLIN L A PENICILLIN G BENZATHINE PENICILLIN G BENZATHINE Arrhythmia ar less Cardiac arrest severe…

…infusion. Adverse effects Flushing. Nausea. Bronchospasm. AV block. Caution • Avoid in acute heart failure. • May cause bradycardia. Esmolol doses and administration in hypertension and tachycardia.

…HF), acute Heart failure (HF), chronic Bradycardia (second line alternative) Medium dose : 3.0 10.0 μg/kg/min. + ++++ + +++++ Medium dose dopamine activates β1…

…effect). • Used cautiously in patients with asthma (due to risk of bronchospasm). • Used cautiously in bradycardia due to negative chronotropic effect. • In patients with pheochromocytoma…

…patients with asthma (due to risk of bronchospasm). • Used cautiously in bradycardia due to negative chronotropic effect. Metoprolol doses and administration in hypertension (hypertensive crisis…

…Hypokalemia Hypomagnesemia Hypocalcemia Starvation Anorexia nervosa Liquid protein diets Hypothyroidism Bradyarrhythmia Sinus bradycardia Sinus node dysfunction AV blocks Drugs Drug Brands TdP Risk Class Clinical…

…Note that escape rhythms may arise during bradycardia. Also, note that bradycardia due to dysfunction in the sinoatrial node is referred to as sinus node…

…if the patient reverts to sinus rhythm. Th e infusion must be aborted if hypotension or bradycardia occurs. A defibrillator should be immediately available as…

…and qRS pattern in V6 with QRS duration <120 ms) D: Profound sinus bradycardia (<30 beats/min or sinus pauses ≥3 s) Explanation: Incomplete Right…

…detect excessive QT prolongation, proarrhythmia, and severe bradycardia. Patients should be monitored for arrhythmias and QT prolongation with each dose adjustment, typically waiting 2 to…

…include: Unexplained systolic blood pressure < 90 mmHg Suggestion of gastrointestinal hemorrhage Persistent bradycardia (< 40 beats/min) Undiagnosed systolic murmur Carotid sinus massage should…

…availability of atropine, isoproterenol, or transcutaneous pacing for post shock bradycardia, and use of biphasic defibrillators , which are standard due to superior efficacy over monophasic…

…hypercalcemia Common ECG changes Shortened QT interval. Lengthened QRS duration. Bradycardia may occur. Rare ECG changes Increased QRS amplitude. Diminished T wave amplitude Osborn like…

…Note that escape rhythms may arise during bradycardia. Also, note that bradycardia due to dysfunction in the sinoatrial node is referred to as sinus node…

…HF), acute Heart failure (HF), chronic Bradycardia (second line alternative) Medium dose : 3.0 10.0 μg/kg/min. + ++++ + +++++ Medium dose dopamine activates β1…

…2 and AV block 3. The only treatment with a class I recommendation for the management of acute bradycardia is transcutaneous pacing. Pharmacological interventions (Table…

…Cardiac arrhythmias can be subdivided into the following categories: Bradyarrhythmia s (bradycardia): arrhythmias commonly due to dysfunctional automaticity in pacemaker cells or blocking of impulses…

…is indicative of previous myocardial infarction. U wave changes New U waves (in absence of bradycardia) may indicate ischemia. If U waves were present on…

…be defibrillated or cardioverted. These rhythms include pulse less electrical activity (PEA), asystole, and bradycardia. No Flow : Circulatory standstill, circulatory flow arrest. No flow time…

…or apnoea Pulse Under 110 per minute At least 110 per minute Bradycardia or arrhythmia PEF Over 50 percent of personal best or predicted 33…

…maximum 0.5 mg For bradycardia with compromise Isoprenaline 0.02–0.15 µg/kg/min 0.02–0.1 µg/kg/min A bridge…

…0.5 mm V3R–V4R (right ventricle) ≥ 0.5 mm (≥ 1.0 mm in men < 30 years) Other thresholds Sinus bradycardia: < 50/min…

…new bradycardia and acute kidney injury may be at greater immediate risk than a stable dialysis patient with a plasma potassium of 6.6 mmol…

…Heart failure, acute or chronic. Bradycardia (second line option). 3.0–10.0 μg/kg/min + ++++ + +++++ Intermediate dose dopamine activates β1, releases noradrenaline and…

…cause — warm the patient instead. Refractory shock in which the bradycardia and reduced contractility of hypothermia are not tolerated. A decision to withhold further life…

…Thus, it should not be used during bradycardia and tachycardia. Fridericia’s and Framingham formulas are often preferred in scenarios where a broader range of…

…can be treated with ticagrelor for up to 12 months. Use with caution in patients at risk for bradycardia (slow heart rate). Central sleep apnea…

…or rapid palpitations. These symptoms often accompany QTc prolongation with new onset bradycardia or a high degree of heart block. In patients with severe mental…

…Cardiac toxicity presents as various arrhythmias, ranging from bradycardias related to enhanced vagal effect to life threatening tachyarrhythmias. Evaluation and Physical Examination Physical examination of…

…foscarnet, atazanavir) Hypokalemia Hypocalcemia Hypomagnesemia Cerebrovascular insult (bleeding) Myocardial ischemia Cardiomyopathy Bradycardia Hypothyroidism Hypothermia A separate chapter discusses Long QT syndrome (LQTS). A complete list…

…2 AV block, third degree AV block). Sick sinus syndrome or symptomatic bradycardia in the absence of a pacemaker. Hypersensitivity to adenosine. Administration Normal route…

…changes: Increased QRS amplitude. Osborn waves. ST elevation in V1 v2. Sinus node dysfunction (bradycardia). Ventricular tachycardia (VT), ventricular fibrillation (VF). Clinical presentation Confusion Abdominal…

…situations, the underlying condition should be targeted and, if necessary, bradycardia should be treated (treatment alternatives are discussed in the article on sinus node dysfunction).