Wagner_Marriot's Practical Electrocardiography, 12e

Contents

Digital Contents x Contributors xii

Foreword xv Preface xvii

SECTION I: BASIC CONCEPTS

CHAPTER 1

CARDIAC ELECTRICAL ACTIVITY Galen S. Wagner, Tobin H. Lim, and David G. Strauss

1

The Book: Marriott’s Practical Electrocardiography , 12th Edition

2 3 4 6

The Electrocardiogram

Anatomic Orientation of the Heart

The Cardiac Cycle

Cardiac Impulse Formation and Conduction

10 12 17

Recording Long-Axis (Base–Apex) Cardiac Electrical Activity Recording Short-Axis (Left versus Right) Cardiac Electrical Activity RECORDING THE ELECTROCARDIOGRAM Galen S. Wagner, Raymond R. Bond, Dewar D. Finlay, Tobin H. Lim, and David G. Strauss The Standard 12-Lead Electrocardiogram

CHAPTER 2

23

24 31 34 37 42

Correct and Incorrect Electrode Placements

Alternative Displays of the 12 Standard Electrocardiogram Leads

Alternative Electrode Placement

Other Practical Points for Recording the Electrocardiogram

CHAPTER 3

INTERPRETATION OF THE NORMAL ELECTROCARDIOGRAM

47

Galen S. Wagner, Tobin H. Lim, David G. Strauss, and Jacob Simlund

Electrocardiographic Features

48 50 53 54 55 62 64 66 67 68

Rate and Regularity P-Wave Morphology

The PR Interval

Morphology of the QRS Complex Morphology of the ST Segment

T-Wave Morphology U-Wave Morphology

QTc Interval

Cardiac Rhythm

iv