Mitral Valve Surgery

von: Robert S. Bonser, Domenico Pagano, Axel Haverich

Springer-Verlag, 2010

ISBN: 9781849964265 , 168 Seiten

Format: PDF

Kopierschutz: Wasserzeichen

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Mitral Valve Surgery


 

Mitral Valve Surgery

2

Copyright page

3

Series Preface

4

Contents

6

Contributors

8

Part I Anatomy, Pathology, and Natural Historyof Mitral Valve Disease

10

1: Surgical Anatomy of the Mitral and Tricuspid Valve

11

Introduction

11

Fibrous Skeleton of the Heart

11

Mitral Valve: The Functional Unit

13

The Structure of the Functional Unit

13

Mitral Valve Annulus

14

Mitral Valve Leaflets

15

Mitral Valve Chordae Tendinae

17

Mitral Valve Papillary Muscles

18

Physiology of the Functional Unit

18

Mitral Valve Annular Dynamics

18

Mitral Valve Leaflet Physiology

19

Mitral Valve Papillary Muscles

20

Left Ventricular Muscle

20

Summary of the Impact of Mitral Valve Physiology

20

Mitral Valve Functional Unit Co-location: Surgical Considerations

21

Tricuspid Valve: The Functional Unit

21

The Structure of the Functional Unit

21

Tricuspid Valve Annulus

22

Tricuspid Valve Leaflets

23

Tricuspid Valve Chordae Tendinae

24

Tricuspid Valve Papillary Muscles

24

Physiology of the Functional Unit

24

Tricuspid Valve Annular Dynamics

24

Tricuspid Valve Leaflet Physiology

25

Tricuspid Valve Papillary Muscle Physiology

25

Tricuspid Valve Functional Unit Co-location: Surgical Considerations

25

Right Coronary Artery

25

Conduction Tissue

25

Aortic and Mitral Valve

26

Summary

26

References

26

2: Pathology and Classification of Mitral Valve Disease

28

Introduction

28

Mitral Stenosis

28

Rheumatic Mitral Stenosis

28

Mitral Annular Calcification

29

Immune Mediated Mitral Stenosis

29

Carcinoid Heart Disease and Drug Induced Valvular Heart Disease

29

Congenital Mitral Valve Stenosis

30

Pathophysiology of Mitral Stenosis

30

Mitral Regurgitation

31

Ischemic and Functional Mitral Regurgitation

32

Mitral Valve Prolapse

32

Rheumatic Mitral Regurgitation

33

Mitral Annular Calcification

33

Infective Endocarditis

33

Congenital Mitral Regurgitation

34

Pathophysiology of the Mitral Valve Regurgitation

34

Prosthetic Heart Valves

34

Prosthetic Valve Endocarditis

35

Structural Dysfunction

35

Nonstructural Dysfunction

35

References

35

3: Chronic Mitral Regurgitation

37

Anatomy of the Mitral Valve Apparatus

37

Mechanisms of Chronic Mitral Regurgitation

38

Pathophysiology

39

Determinants of Regurgitant Volume

39

LV Mechanics in MR

39

LV Compensation

39

LV Decompensation

40

Epidemiology

40

Symptoms

40

Physical Examination

41

Laboratory Investigations

41

Electrocardiography

41

Chest Roentgenogram

41

Echocardiography

41

Etiology

42

Repairability

44

Cardiac Catheterization

44

Natural History

44

Indications for Mitral Valve Surgery

44

Surgical Considerations

46

References

46

4: Chronic Ischemic Mitral Regurgitation

49

Introduction

49

Prevalence and Prognostic Impact

49

Mechanisms of Ischemic MR

49

Impaired Contractile Function

50

Increased Leaflet Tethering

50

Annular Dilatation

51

Dynamic Nature of Ischemic MR

52

Evaluation of Patients with Ischemic MR

53

Echocardiography

53

Stress Echocardiography

53

Magnetic Resonance Imaging

54

Coronary Angiography

54

Management of Patients with Ischemic MR

54

Myocardial Revascularization

54

Cardiac Resynchronization Therapy

54

Medical Treatment

54

Surgical Approaches

55

Mitral Valve (MV)Repair

55

Mitral Valve Replacement

55

Indications for Mitral Valve Surgery

55

References

55

5: Asymptomatic Mitral Valve Regurgitation: Watchful Wait or Early Repair? Review of the Current Evidence

58

Introduction

58

Severe Mitral Regurgitation

58

Existing Guidelines

58

Current State of Valve Repair

59

What Is the Outcome of Patients with Asymptomatic Severe Mitral Regurgitation?

59

Echocardiographic Assessment

60

Severity of Mitral Regurgitation

60

Etiology and Mechanism

61

Left Ventricular Function

61

Other Abnormalities

61

The Place of Exercise Testing and Exercise Echocardiography

61

Frequency of Review

62

Studies on Improving Mitral Services

62

IS There a Need for a Randomized Study?

62

References

63

Part II Mitral Valve Repair and ReplacementTechniques

64

6: Mitral Valve Prosthesis Insertion with Preservation of the Sub-Valvar Apparatus

65

Introduction

65

Surgical Strategies for Preservation of the Atrio-Ventricular Loop During Insertion of a Mitral Prosthesis

67

Surgical Techniques

67

Annular Calcification

69

References

71

7: How I Assess and Repair the Barlow Mitral Valve: The Respect Rather Than Resect Approach

72

Definition

72

Valve Assessment

73

Echocardiographic Analysis

73

Surgical Valve Analysis

73

Free Edge Mobility

73

Excess of Tissue

74

Mucoid Degeneration

74

Surgical Strategy

74

Repair of the Posterior Leaflet

76

Leaflet Mobility

76

The Goal of a Smooth and Vertical Surface of Coaptation

77

Intermediary Surgical Test

77

Repair of the Anterior Leaflet

77

Ring Annuloplasty

77

Control of the Result

78

Surgical Control

78

Echocardiographic Control

78

References

79

8: How I Assess and Repair the Barlow Mitral Valve: The Edge-to-Edge Technique

80

Introduction

80

The Edge-to-Edge Technique for Bileaflet Prolapse in Barlow’s Disease

80

Surgical Technique and Results

81

The Edge-to-Edge Technique for Anterior Leaflet Prolapse

84

The Edge-to-Edge Technique for Commissural Prolapse

84

The Minimally Invasive Approach Option

85

Edge-to-Edge Repair and Annuloplasty

85

Double Orifice Edge-to-Edge Repair and Hemodynamics

86

Edge-to-Edge Repair and the Risk of Functional Mitral Stenosis

86

References

87

9: How I Assess and Repair the Barlow Mitral Valve

88

Valve Assessment

91

Surgical Exposure

93

Strategies for Surgical Repair

94

References

98

10: Ischemic Mitral Regurgitation

99

Introduction

99

Definitions and Mechanisms

99

Consequences of Ischemic Mitral Regurgitation

99

Surgical Treatment of Ischemic Mitral Regurgitation

101

Alternative Surgical Strategies

102

Outcome of Surgical Treatment

102

References

104

11: Minimally Invasive Mitral Valve Surgery

106

Introduction

106

Minimally Invasive Surgical Approaches

106

Right Mini-Thoracotomy

106

Robotically Assisted Right Thoracic Approach

109

Partial Sternotomy

109

Minimally Invasive Approaches: Comparison of Technical Considerations and Patient Selection

109

Results of Minimally Invasive Mitral Valve Surgery

110

Valve Repair

110

Mortality and Morbidity

110

Benefits of Minimally Invasive Mitral Valve Surgery

111

Cosmesis

111

Postoperative Pain

112

Hospital Length of Stay and Recovery

112

Transfusion

112

Wound Infection

112

Cost

112

Benefits: Summary

113

Repair Techniques

113

Posterior Prolapse

113

Triangular Resection

113

Folding Plasty

113

Anterior Prolapse

113

Commissural Prolapse

114

Recommendations

114

Future Directions

114

References

114

12: Mitral Stenosis

117

Etiology and Epidemiology

117

Pathology and Pathophysiology

117

Natural History

119

Clinical Features

120

Physical Exam and Diagnostic Tests

120

Electrocardiography

121

Chest X-Ray

121

Echocardiography

121

Intervention

121

Closed Surgical Commissurotomy

121

Open Surgical Commissurotomy

122

Percutaneous Mitral Balloon Valvuloplasty

123

Indication

125

References

127

Part III Other Conditions

130

13: Atrial Fibrillation: Non Surgical Management

131

Introduction

131

Pathophysiology and Electrophysiology

131

Clinical Classification

132

Pharmacological Agents

132

General Non surgical Management Strategies

133

Rate Control in Acute AF

133

Cardioversion in Acute AF

134

Paroxysmal AF

134

Persistent AF

135

Permanent AF

137

Nonpharmacological Treatments for AF

137

Antithrombotic Therapy

138

Future Perspectives

138

Conclusion

140

References

140

14: Ablation of Atrial Fibrillation with Cardiac Surgery

142

Introduction

142

Rationale for Surgical Ablation

142

AF Prevalence

142

AF Dangers

142

AF Mechanisms and Implications for Surgical Ablation

143

The Maze Procedure

143

New Approaches to Surgical Ablation of Atrial Fibrillation

145

Lesion Sets

145

A Review of the Available Energy Sources

145

The Left Atrial Appendage

147

Challenges and Future Directions

147

Reporting Results

147

Ablation Technology and Intraoperative Assessment

147

Minimally Invasive Approaches

147

Conclusions

148

References

148

15: Tricuspid Regurgitation: Natural History, Assessment, and Intervention

151

Natural History

151

Clinical Features

152

TR Assessment

152

Surgical Treatment

155

Patients with Annular Dilatation with or Without Regurgitation

157

Patients with Annular Dilatation with Moderate or Severe TR with Some Degree of Tethering

157

Patients with Annular Dilatation with Severe Tethering

157

Conclusion

158

References

158

Index

160