TY - CHAP M1 - Book, Section TI - Premature Ventricular Beats, Non-Sustained Ventricular Tachycardia, and Idioventricular Rhythm A1 - John,, Roy M. A1 - Stevenson, William G. A2 - Jameson, J. Larry A2 - Fauci, Anthony S. A2 - Kasper, Dennis L. A2 - Hauser, Stephen L. A2 - Longo, Dan L. A2 - Loscalzo, Joseph PY - 2018 T2 - Harrison's Principles of Internal Medicine, 20e AB - Premature ventricular contractions (see Fig. 247-1A) can be due to automaticity or reentry (see Chap. A9). They are often sensitive to sympathetic stimulation and can be a sign of increased sympathetic tone, myocardial ischemia, hypoxia, electrolyte abnormalities, particularly hypokalemia, or underlying heart disease. During myocardial ischemia or in association with other heart disease, PVCs can be a harbinger of sustained VT or VF. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accesspharmacy.mhmedical.com/content.aspx?aid=1156562454 ER -