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ECGs Made Easy - E-Book

ECGs Made Easy - E-Book

Barbara J Aehlert

(2017)

Abstract

Understanding ECGs has never been easier than with ECGs Made Easy, 6th Edition! In compliance with the American Heart Association’s 2015 ECC resuscitation guidelines, Barbara Aehlert’s new edition offers clear explanations, a conversational tone, and a wealth of practice exercises to help students and professionals from a variety of medical fields learn how to accurately recognize and interpret basic dysrhythmias. Each heart rhythm covered in the book includes a sample ECG rhythm strip and a discussion of possible patient symptoms and general treatment guidelines. Other user-friendly features include: ECG Pearls with insights based on real-world experience, Drug Pearls highlighting the medications used to treat dysrhythmias, Clinical Correlation call-outs, Lead In applicatinos, Stop & Review questions, a comprehensive post-test with answers, and more. It’s everything you need to master ECG interpretation with ease!

  • Clear ECG discussions highlight what you need to know about ECG mechanisms, rhythms, and heart blocks, such as: How Do I Recognize It? What Causes It? What Do I Do About It?
  • Introduction to the 12-Lead ECG chapter provides all the basics for this advanced skill, including determining electrical axis, ECG changes associated with myocardial ischemia and infarction, bundle branch block, and other conditions.
  • A comprehensive post-test with answers at the end of the book measures your understanding.
  • ECG Pearl boxes offer useful hints for interpreting ECGs, such as the importance of the escape pacemaker.
  • Drug Pearl boxes highlight various medications used to treat dysrhythmias.
  • Chapter key terms focus your attention on the most important information.
  • Chapter objectives tied to chapter text enable you to quickly review content that satisfies specific learning objectives.
  • NEW! 38 New cardiac rhythm strips have been added to the book for a total of 260 practice strips.
  • NEW! AHA compliance ensures the book reflects the American Heart Association’s 2015 ECC resuscitation guidelines.
  • NEW! Lead In boxes cover ECG principles, practical applications, indications, techniques, and interpretation.
  • NEW! Expanded coverage of ambulatory monitoring provides more in-depth guidance in this critical area.

Table of Contents

Section Title Page Action Price
Front Cover Cover
ECGs MADE EASY i
Copyright ii
Preface to the Sixth Edition iii
Acknowledgments iv
Dedication v
Reviewers for the Sixth Edition vi
About the Author vii
Contents viii
1 - Anatomy and Physiology 1
LOCATION, SIZE, AND SHAPE OF THE HEART 2
SURFACES OF THE HEART 2
COVERINGS OF THE HEART 2
STRUCTURE OF THE HEART 5
Layers of the Heart Wall 5
CARDIAC MUSCLE 6
Heart Chambers 6
ATRIA 7
VENTRICLES 7
Heart Valves 8
ATRIOVENTRICULAR VALVES 8
SEMILUNAR VALVES 10
HEART SOUNDS 10
The Heart’s Blood Supply 11
CORONARY ARTERIES 11
Right Coronary Artery 12
Left Coronary Artery 13
Coronary Artery Dominance 13
ACUTE CORONARY SYNDROMES 13
CORONARY VEINS 16
The Heart’s Nerve Supply 16
SYMPATHETIC STIMULATION 16
PARASYMPATHETIC STIMULATION 17
BARORECEPTORS AND CHEMORECEPTORS 17
THE HEART AS A PUMP 19
Cardiac Cycle 19
ATRIAL SYSTOLE AND DIASTOLE 20
VENTRICULAR SYSTOLE AND DIASTOLE 20
Blood Pressure 20
CARDIAC OUTPUT 22
Stroke Volume 22
Heart Rate 22
2 - Basic Electrophysiology 28
CARDIAC CELLS 30
Types of Cardiac Cells 30
Properties of Cardiac Cells 30
CARDIAC ACTION POTENTIAL 30
Polarization 31
Depolarization 31
Repolarization 32
Phases of the Cardiac Action Potential 32
Refractory Periods 34
CONDUCTION SYSTEM 35
Sinoatrial Node 35
Atrioventricular Node and Bundle 37
Right and Left Bundle Branches 38
Purkinje Fibers 38
Disorders of Impulse Formation 39
ABNORMAL AUTOMATICITY 39
TRIGGERED ACTIVITY 39
Disorders of Impulse Conduction 39
CONDUCTION BLOCKS 39
REENTRY 39
Electrodes 41
Leads 42
FRONTAL PLANE LEADS 42
Standard Limb Leads 42
Augmented Limb Leads 43
HORIZONTAL PLANE LEADS 44
Chest Leads 44
Right Chest Leads 45
Posterior Chest Leads 45
ALTERNATIVE LEADS 45
Ambulatory Cardiac Monitoring 46
TYPES OF AMBULATORY MONITORS 46
Waveforms 48
P WAVE 49
QRS COMPLEX 50
QRS Measurement 51
Abnormal QRS Complexes 51
QRS Variations 51
T WAVE 51
Abnormal T Waves 52
U WAVE 53
Segments 53
PR SEGMENT 53
TP SEGMENT 53
ST SEGMENT 53
Abnormal ST Segments 55
Intervals 55
Abnormal PR Intervals 55
QT INTERVAL 56
R-R AND P-P INTERVALS 56
Artifact 56
Assess Regularity 57
VENTRICULAR REGULARITY 57
ATRIAL REGULARITY 58
Assess Rate 58
METHOD 1: SIX-SECOND METHOD 58
METHOD 2: LARGE BOXES 58
METHOD 3: SMALL BOXES 58
Identify and Examine Waveforms 60
Assess Intervals and Examine Segments 60
PR INTERVAL 60
QRS DURATION 60
QT INTERVAL 60
EXAMINE ST SEGMENTS 60
Interpret the Rhythm 60
3 - Sinus Mechanisms 76
INTRODUCTION 76
How Do I Recognize It? 77
SINUS RHYTHM 77
How Do I Recognize It? 78
What Causes It? 78
What Do I Do About It? 79
How Do I Recognize It? 80
What Causes It? 80
What Do I Do About It? 81
SINUS ARRHYTHMIA 81
How Do I Recognize It? 81
What Causes It? 81
What Do I Do About It? 82
SINOATRIAL BLOCK 82
How Do I Recognize It? 82
What Causes It? 82
What Do I Do About It? 83
SINUS ARREST 83
How Do I Recognize It? 83
What Causes It? 83
What Do I Do About It? 84
4 - Atrial Rhythms 102
INTRODUCTION 103
ATRIAL DYSRHYTHMIAS: MECHANISMS 103
Abnormal Automaticity 103
Triggered Activity 103
Reentry 104
PREMATURE ATRIAL COMPLEXES 104
How Do I Recognize It? 104
Aberrantly Conducted Premature Atrial Complexes 106
Nonconducted Premature Atrial Complexes 106
WHAT CAUSES THEM? 106
WANDERING ATRIAL PACEMAKER 107
How Do I Recognize It? 107
What Causes It? 107
What Do I Do About It? 107
MULTIFOCAL ATRIAL TACHYCARDIA 108
How Do I Recognize It? 108
What Causes It? 108
What Do I Do About It? 108
SUPRAVENTRICULAR TACHYCARDIA 108
Atrial Tachycardias 109
HOW DO I RECOGNIZE IT? 110
WHAT CAUSES IT? 110
WHAT DO I DO ABOUT IT? 111
VAGAL MANEUVERS 112
SYNCHRONIZED CARDIOVERSION 112
Indications 113
Atrioventricular Nodal Reentrant Tachycardia 113
HOW DO I RECOGNIZE IT? 113
WHAT CAUSES IT? 114
WHAT DO I DO ABOUT IT? 114
HOW DO I RECOGNIZE IT? 116
WHAT CAUSES IT? 116
WHAT DO I DO ABOUT IT? 116
ATRIAL FLUTTER 117
How Do I Recognize It? 117
What Causes It? 118
What Do I Do About It? 118
ATRIAL FIBRILLATION 119
How Do I Recognize It? 119
What Causes It? 121
What Do I Do About It? 121
5 - Junctional Rhythms 141
INTRODUCTION 141
PREMATURE JUNCTIONAL COMPLEXES 142
How Do I Recognize Them? 142
What Causes Them? 143
What Do I Do About Them? 143
JUNCTIONAL ESCAPE BEATS OR RHYTHM 144
How Do I Recognize It? 144
What Causes It? 145
6 - Ventricular Rhythms 165
INTRODUCTION 166
PREMATURE VENTRICULAR COMPLEXES 166
How Do I Recognize Them? 166
What Causes Them? 170
What Do I Do About Them? 170
VENTRICULAR ESCAPE BEATS OR RHYTHM 170
How Do I Recognize It? 170
7 - Atrioventricular Blocks 194
INTRODUCTION 194
FIRST-DEGREE ATRIOVENTRICULAR BLOCK 195
How Do I Recognize It? 195
What Causes It? 196
What Do I Do About It? 197
SECOND-DEGREE ATRIOVENTRICULAR BLOCKS 197
SECOND-DEGREE ATRIOVENTRICULAR BLOCK TYPE I 197
How Do I Recognize It? 197
What Causes It? 198
What Do I Do About It? 199
SECOND-DEGREE ATRIOVENTRICULAR BLOCK TYPE II 199
How Do I Recognize It? 199
What Causes It? 200
What Do I Do About It? 200
2:1 ATRIOVENTRICULAR BLOCK 200
How Do I Recognize It? 200
ADVANCED SECOND-DEGREE ATRIOVENTRICULAR BLOCK 201
THIRD-DEGREE ATRIOVENTRICULAR BLOCK 202
How Do I Recognize It? 202
What Causes It? 203
What Do I Do About It? 203
8 - Pacemaker Rhythms 222
PACEMAKER SYSTEMS 223
Temporary Pacemakers 224
TRANSVENOUS PACING 224
EPICARDIAL PACING 224
TRANSCUTANEOUS PACING 224
Pacing Lead Systems 225
PACING CHAMBERS AND MODES 226
Single-Chamber Pacemakers 226
Dual-Chamber Pacemakers 227
Biventricular Pacemakers 227
Fixed-Rate Pacemakers 227
Demand Pacemakers 227
Pacemaker Codes 228
PACEMAKER MALFUNCTION 228
Failure to Pace 228
Failure to Capture 229
Failure to Sense 230
ANALYZING PACEMAKER FUNCTION ON THE ECG 230
9 - Introduction to the 12-Lead ECG 241
INTRODUCTION 241
LAYOUT OF THE 12-LEAD ELECTROCARDIOGRAM 242
VECTORS 242
Axis 243
ACUTE CORONARY SYNDROMES 244
Anatomic Location of a Myocardial Infarction 246
ANTERIOR INFARCTION 247
R-Wave Progression 247
LATERAL INFARCTION 248
INFERIOR INFARCTION 248
INFEROBASAL INFARCTION 248
RIGHT VENTRICULAR INFARCTION 251
INTRAVENTRICULAR CONDUCTION DELAYS 254
Structures of the Intraventricular Conduction System 254
Bundle Branch Activation 254
How Do I Recognize It? 254
DIFFERENTIATING RIGHT BUNDLE BRANCH BLOCK FROM LEFT BUNDLE BRANCH BLOCK 255
Right Bundle Branch Block 255
Left Bundle Branch Block 255
An Easier Way 256
EXCEPTIONS 256
What Causes It? 257
What Do I Do About It? 257
CHAMBER ENLARGEMENT 257
Atrial Abnormalities 258
Ventricular Abnormalities 259
ELECTROLYTE DISTURBANCES 260
Sodium 261
HYPERNATREMIA 261
HYPONATREMIA 261
Potassium 261
HYPERKALEMIA 261
HYPOKALEMIA 261
Calcium 262
HYPERCALCEMIA 262
HYPOCALCEMIA 262
Magnesium 263
HYPERMAGNESEMIA 263
HYPOMAGNESEMIA 263
ANALYZING THE 12-LEAD ELECTROCARDIOGRAM 263
10 - Posttest 278
Index 321
A 321
B 321
C 322
D 322
E 322
F 323
G 323
H 323
I 323
J 323
K 323
L 323
M 323
N 324
O 324
P 324
Q 324
R 324
S 325
T 325
U 325
V 325
W 326