Lead Placement and Acquisition of the 12Lead（领导位置和收购的12）.pdf

chapter 1 Lead Placement and Acquisition of the 12-Lead Electrocardiogram Page, 12-Lead ECG for Acute and Critical Care Providers © 2006 by Pearson Education, Inc. Upper Saddle River, NJ Chapter 1 Objectives • Differentiate bipolar and unipolar limb leads and precordial leads • Describe the lead placement for a 12-lead electrocardiogram • Describe the procedure for 12-lead acquisition • Describe the procedure for multi-lead acquisition using a 3-lead bipolar machine Page, 12-Lead ECG for Acute and Critical Care Providers © 2006 by Pearson Education, Inc. Upper Saddle River, NJ 3 Electrodes – Limb Leads • RA – Right arm • LA – Left arm • LL – Left leg • RL – Right Leg Page, 12-Lead ECG for Acute and Critical Care Providers © 2006 by Pearson Education, Inc. Upper Saddle River, NJ 4 Bipolar Limb Leads • Two electrodes • Positive and negative • Positive “looks toward negative” • Einthoven’s Triangle Page, 12-Lead ECG for Acute and Critical Care Providers © 2006 by Pearson Education, Inc. Upper Saddle River, NJ Unipolar Limb Leads • Augmented by signal averaged CT • aVR - right arm positive • aVL - left arm positive • aVF - left