TY - CHAP M1 - Book, Section TI - Disorders of Rate & Rhythm A1 - Bashore, Thomas M. A1 - Granger, Christopher B. A1 - Jackson, Kevin P. A1 - Patel, Manesh R. A2 - Papadakis, Maxine A. A2 - McPhee, Stephen J. A2 - Rabow, Michael W. A2 - McQuaid, Kenneth R. PY - 2022 T2 - Current Medical Diagnosis & Treatment 2022 AB - Abnormalities of cardiac rhythm and conduction can be symptomatic (syncope, near syncope, dizziness, fatigue, or palpitations) or asymptomatic. In addition, they can be lethal (sudden cardiac death) or dangerous to the extent that they reduce cardiac output, so that perfusion of the brain and myocardium is impaired. Stable supraventricular tachycardia (SVT) is generally well tolerated in patients without underlying heart disease but may lead to myocardial ischemia or heart failure in patients with coronary disease, valvular abnormalities, and systolic or diastolic myocardial dysfunction. Ventricular tachycardia, if prolonged, often results in hemodynamic compromise and may deteriorate into ventricular fibrillation if left untreated. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2023/12/09 UR - accessmedicine.mhmedical.com/content.aspx?aid=1184695806 ER -