44. SVT vs VT Clinical history Medication Drug-induced tachycardia -> Torsade de pointes Diuretics Digoxin-induced arrhythmia -> [digoxin] ≥2ng/l or normal if hypokalemia Age - ≥ 35 ys -> VT (positive predictive value of 85%) Underlying heart disease Previous MI -> 98% VT Pacemakers or ICD Increased risk of ventricular tachyarrhythmia
56. Torsade de Pointes EKG Characteristics: Irregular wide-complex tachycardia The morphology, amplitude, and axis of the QRS complexes cycle through a sinusoidal pattern No discernable P waves
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59. Tachycardia algorithm AHA Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care. Ciurculation 2005