Narrow Complex Tachycardia

Abstract

Page 1 of 2 Effective Jan. 2018 History • Medications (e.g. Aminophylline, Adderall, diet pills, thyroid supplements, decongestants, and Digoxin) • Diet • Drugs (e.g. nicotine and illegal drugs) • Past medical history • History of palpations/heart racing • Syncope/near syncope Differential • Heart disease (e.g. WPW or valvular) • Sick sinus syndrome • Myocardial infarction • Electrolyte imbalance • Exertion, pain, or emotional stress • Fever • Hypoxia • Hypovolemia or anemia • Drug effect/overdose (see History) • Hypothyroidism • Pulmonary embolus Signs and Symptoms • Heart rate > 150 with narrow, regular complexes • Systolic BP < 90 • Dizziness, chest pain, shortness of breath, altered mental status, or diaphoresis • CHF • Potential presenting rhythm: • Atrial/sinus tachycardia • Atrial fibrillation/flutter • Multifocal atrial tachycardia • Ventricular tachycardia