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Springer Surgery Atlas Series
Series Editors: J. S. P. Lumley · James R. Howe
Francis C. Wells
Editor
Atlas of
Cardiac Surgery
Springer Surgery Atlas Series
J.S.P.Lumley JamesR.Howe
Francis C. Wells
Editor
Atlas of Cardiac Surgery
Editor
Francis C. Wells Department of Cardiothoracic Surgery Papworth Hospital Cambridge, UK
ISSN 2626-9015 ISSN 2626-9023 (electronic) Springer Surgery Atlas Series ISBN 978-3-031-43194-4 ISBN 978-3-031-43195-1 (eBook)
https://doi.org/10.1007/978-3-031-43195-1
© The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2023 This work is subject to copyright. All rights are solely and exclusively licensed by the Publisher, whether the whole or part of the material is concerned, specically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microlms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specic statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors, and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, expressed or implied, with respect to the material contained herein or for any errors or omissions that may have been made. The publisher remains neutral with regard to jurisdictional claims in published maps and institutional afliations.
This Springer imprint is published by the registered company Springer Nature Switzerland AG The registered company address is: Gewerbestrasse 11, 6330 Cham, Switzerland
Paper in this product is recyclable
Foreword
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It is a pleasure to provide the Foreword for this splendid Cardiac Surgical Atlas, particularly as many of the contributors were former colleagues of mine, at the now Royal Papworth Hospital.
The content is comprehensive and reects the experience and meticulous approach the con­tributors brought to their task. Any surgeon contemplating an operation must feel condent of the anatomy that will be encountered. This Atlas is an excellent reference work designed to provide this. It should therefore nd space in any cardiac surgical library.
Oxford, UK TerenceEnglish
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Preface
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Cardiac surgery is a comparatively young speciality having its meaningful origins in the sec­ond half of the twentieth century. It is a speciality heavily dependent upon and integrated with bioengineering. The technology involved is extensive, critical and constantly developing. Without the steady development of materials, technology and prostheses, surgery of the heart would not have reached the levels of safety now routinely achieved internationally. Few condi­tions cannot be treated successfully in the modern world.
To achieve this, the surgeon must have a dexterity of hand and mind allied with a sound knowledge of physiology, anatomy and embryology. Cardiac surgery is a team endeavour. The environment of the operating theatre is more akin to an orchestra than a solo effort. The sur­geon must act as an interpreter and conductor carrying the ultimate responsibility for the patient; the players ensure the outcome. The integrated skills and knowledge base of the per­fusionist, anaesthetist, nurses and assistants are vital for routine success.
In this Atlas, we have endeavoured to provide an illustration of the basic surgical procedures as performed by the current team of surgeons at the Royal Papworth Hospital, a place where innovation, excellence and education are at the forefront of all that we do.
A Short History oftheEvolution ofCardiac Surgery
Surgery of the heart and of the brain are two of the last big conceptual developments in the history of the surgical profession. For cardiac surgery to develop in a meaningful way, there has had to be a deeply integrated approach with the biotechnology industry and deep under­standing of the physiology of the cardiovascular system and haematology, in particular the science of blood rheology and clotting.
In this brief review, I have concentrated on the earliest phases of development of the special­ity as much of it is unknown by the modern trainee and has slipped into the mists of medical history. I have not expanded on the more modern techniques and technology as this will be within the purview of contemporary teachers and our younger colleagues.
The earliest operations on the heart that carried some degree of success were those for car­diac trauma. First among these was done by Ludwig Rehn, a senior surgeon at Frankfurt City Hospital, a surgeon known for his willingness to innovate. On September 7th in 1896, Rehn was presented with a 22-year-old gardener’s assistant, Wilhelm Justus, who had been attacked by a stranger with a knife and stabbed between his fourth and fth ribs. Faced with a decision between allowing the young man to die of cardiac tamponade or an attempt at surgical closure of the cardiac wound, Rehn elected to attempt repair. On opening the pericardium and draining the intrapericardial blood, he was able to nd the small incision in the right ventricle and to close it with three interrupted sutures. It was a success, and Wilhelm regained consciousness 2h later. The importance of this singular success began the process of undoing the words of the great Viennese surgeon, Theodor Billroth, who stated, “A surgeon who tries to suture a heart wound deserves to lose the esteem of his colleagues”. His English contemporary Stephen Paget stated, “Surgery of the heart has probably reached the limits set by Nature to all surgery:
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no new method and no new discovery can overcome the natural difculties that attend a wound of the heart”.
Until the advent of effective antibiotics, group C streptococcal pharyngitis induced an auto­immune disorder referred to as rheumatic fever. The brain and the heart were frequently affected producing choreoathetosis (St. Vitus dance) and myocarditis, which was accompanied by a valvulitis which scarred the heart valves in the following order of frequency: aortic, mitral, tricuspid and very occasionally pulmonary. The rst to associate heart disease with rheumatic fever was David Pitcairn, a Scottish physician working at St. Bartholomew’s Hospital, London, in 1788. In 1812, William Charles Wells strengthened the association. In 1898, London physi­cian Daniel Samways in a paper in The Lancet predicted that “one day mitral stenosis, a nar­rowing of the mitral valve caused by rheumatic vegetations, might be relieved by simply notching the mitral valve and leaving the atrium to continue with its defence”. The word veg­etation was used likening the clumps of inammatory tissue on the valve to the small orets of some vegetables such as broccoli.
Four years later, the English surgeon, Sir Thomas Lauder Brunton, came to the same conclusion. He noted that at post-mortem, the damaged valve was easy to open with a scalpel. This was met with derision in much of the medical community. Interestingly, Rehn wrote that the heart valves were “out of bounds”! Some surgeons in France tried primitive closed proce­dures but without good effect. The problem was the inability to see inside the heart. In the early 1920s, Evarts Graham with Duff Allen made a “cardioscope” in an attempt to look inside the chambers of the heart. As can be imagined, little could be seen. They attached a little knife to it with a view to cutting the fused mitral valve. It was a failure. In Boston, Elliott Cutler attempted crude valvotomy plunging a knife through the ventricular wall, poking it about until it met resistance from what was thought to be the mitral valve and making incisions in what were thought to be the mitral commissures. There were no survivors from nine attempts.
In 1925, Henry Souttar, surgeon at the London hospital and engineer by previous training, approached the valve differently. Operating on a young woman, he inserted his nger through a small incision through the left atrial appendage and was able to form a mental image of the valve at his ngertip. The patient had signicant mitral regurgitation, and he could sense it. He therefore abandoned his idea of incising the mitral commissures and simply pushed his nger through the orice. Following a stormy recovery, the patient survived. Objective improvement could not be found, and therefore, accompanied by the refusal of physicians to refer any more patients, his work in this area ceased. These events brought attempts at surgical correction to an end for two decades.
Dwight Harken, a young Boston surgeon, had also been interested in the possibility of a surgical solution to rheumatic mitral stenosis. However, with the onset of World War II, he was despatched to London as a military surgeon. On arrival, he was confronted with many patients with shrapnel wounds to the chest, penetrating the heart and pericardium. He watched, unable to help, as most of those young men died, needlessly, he thought. He wrote of his amazement that surgeons of skill and experience would not touch the heart as though it was some mysteri­ous organ. With careful planning, he set about, following the lead of Rehn, a programme of surgical shrapnel removal and cardiac repair. He succeeded in removing 134 missiles from the heart and great vessels of wounded soldiers with no deaths [1]. In 1948, following the great success of his military surgery, Dwight Harken returned to his interest in surgery of the rheu­matic heart and tried to relieve mitral stenosis with a valvulotome, as Evarts Graham had sug­gested, with some success. In Philadelphia, Charles Bailey had been trying with little success. At about the same time, Lord Russell Brock had been doing similar work in London at Brompton Hospital. By 1952, Brock reported 100 operations with excellent results. In 1954, Charles Dubost invented a dilator specically for the valve as did Oswald Tubbs and Brock in London. These instruments, which were inserted through the left atrial appendage to access the mitral valve and the left ventricular apex to access the aortic valve, were very successful and helped many people. Overstretching of the valve would produce valve regurgitation, which could be fatal, and so experience was invaluable in achieving regular success. Valvotomy was
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adopted around the world and, in particular in Third World countries, continues to offer help where the more expensive programmes of open-heart surgery are unaffordable [2]. The mod­ern adaptation of this technique is percutaneous balloon valvotomy.
Further and more rened surgical management awaited the ability to support the heart and
lungs articially.
Development was directed in two main ways. For children who needed the correction of
congenital defects, the American pioneer Walt Lillehei proposed an idea that reproduced the situation in the womb with the heart of the mother or, in several cases, the father to provide the propulsion required for blood ow of the infant (Fig.1). These were the cross-circulation pro­cedures. Mother or father was connected by simple tubing from the femoral artery and vein to the child’s circulation (Fig.2). Lillehei achieved great success with this courageous approach and was able to report excellent results at 20 years [3]. This was truly groundbreaking in pae­diatric cardiac surgery, but of no use for an adult with cardiac disease.
For adult cardiac surgery to develop, it would be necessary to be able to stop the heart and
replace it and the lungs with mechanical support. John Gibbon had been working on this concept since the 1930s. For it to be possible, manipulation of the clotting mechanism had to be worked out. Charles Best, the discoverer of insulin, had begun to work with heparin as an anticoagulant. Together with the work of Gordon Murray, they were able to demonstrate that the clotting of the blood could be meaningfully delayed with rened heparin. In 1935, Murray injected heparin into a patient, which delayed the clotting time from 8 to 30min. Working with his wife Mary, the Gibbons steadily developed their heart and lung machine and by 1935 were able to sustain a cat for almost 4h. His work was interrupted for 4 years when he insisted on enlisting for military service. By 1954, he felt he had a machine that was t for purpose, but many failures continued to occur, which were compounded by inaccurate or simply wrong diagnoses, and the surgeon regularly did not know what they were going to nd at surgery.
In parallel with these developments, Wilfred Bigelow in Toronto had been working on the idea of using profound hypothermia for protection and operating on the still, cold heart. Henry Swan in Denver was the rst to use profound hypothermia in a signicant number of cases with any degree of success. However, he admitted that these were very nerve-wracking opera­tions, which depended so much on speed and accurate diagnoses, which was not always the
Fig. 1 Dr. Walton Lillehei and the scene in the operating theatre during a cross-circulation operation. All the attention is focussed on the child. The parent is on a table next to the one in the image with simply an anaesthe­tist and nurse standing by (UAB Archives, University of Alabama at Birmingham)
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Preface
Fig. 2 The set-up for cross-circulation showing the cannulation of the parent and child with the bubble lter and augmenting pump in line with the circulation, and inset shows the placement of the cannulae and the defect to be corrected
case. The technique allowed success with atrial septal defect closure and easy ventricular defects but was still limited in its application.
Once again, Lillehei was in the frame developing the DeWall-Lillehei bubble oxygenator. In this device, oxygen was bubbled into the blood. A separating chamber allowed most of the bubbles to be removed. A heat exchanger was necessary to prevent the blood from cooling too much before being returned to the body. This machine was used initially and successfully by Lillehei in VSD closure. A true great of cardiac surgery, in fact in many ways the father of the speciality, Walt Lillehei fell from grace in his mid-50s. His reputation as a surgical great was resuscitated by an enormously generous gesture from Dr. John Kirklin, who, in front of the entire audience of the American Association for Thoracic Surgery, drew him to his feet to a warm and standing ovation of more than a thousand pairs of surgical hands (Fig.3).
By 1955, John Kirklin, working at the Mayo Clinic, built a Gibbon machine under licence paying enormous attention to detail, and nally he was able to complete a signicant number of cases successfully. This demonstration of the practical application of the cardio-pulmonary bypass machine opened the door for the rapid expansion of the speciality. Though it would be several years before the problems of haemolysis, renal failure and post-pump syndrome would be fully understood and resolved. Kirklin played a large part in all of these developments and in particular demonstrated the importance of complement activation by the passage of blood across the articial surfaces of the piping in the machine. Post-pump lung was a very signi­cant problem with many patients remaining ventilator dependent post-operatively and several dying with adult respiratory distress syndrome.
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Fig. 3 Dr. John Webster Kirklin (1917–2004) (UAB Archives, University of Alabama at Birmingham)
In 1956, Dr. Wilhelm Kolf, who had already developed the renal dialysis machine, devel-
oped a membrane oxygenator, which was to be the basis of the future in oxygen transfer sys­tems, being far less traumatic on the blood.
At that time, only lesions of the heart that could be directly repaired and cardiac trauma
could be dealt with any degree of success. Within this category was mitral regurgitation. Dwight McGoon, among others, pioneered techniques to reconstruct leaking mitral valves without the need for replacement. Mural leaet imbrication and triangular resection of the mural leaet were techniques pioneered by Dr. McGoon. This simple technique remains of use today. Surgery on the valves of the heart required a whole new branch of technological devel­opment, that of replacement heart valves.
Several types were developed, but the most successful that has endured to this day was once again devised by the fertile mind of Dr. Walt Lillehei. The bi-leaet valve is an ingenious idea which allowed excellent ow characteristics with washing of all of the leaets in diastolic ll­ing. At the same time, the biotechnology company Shiley was working with the Swedish sur­geon Viking Björk on a single tilting disc variety, the Björk-Shiley valve. This too had excellent characteristics and was soon one of the preferred valves of choice. Many other varia­tions were devised including the Starr-Edwards “ball-in-cage”, which was also very success­ful, if obstructive to outow. This valve conceived by Albert Starr was in common usage well into the early twenty-rst century. Poorly thought through changes to the Björk-Shiley valve resulted in signicant early valve failure and withdrawal of the valve under very stressful cir­cumstances for all, but mostly the patients.
In parallel, the idea of tissue valves was being pursued. The ideas took the form of homo­grafts, xenografts and hand-sewn bovine pericardium. Perhaps the most innovative idea was that of the National Heart and Guy’s Hospital surgeon, Donald Ross, who conceived of the idea of switching the pulmonary valve to the aortic position, positing that it would have the same size as the replaced aortic valve and was naturally designed for the purpose. It is a pro­cedure that requires experience and considerable skill to perfect but is an excellent solution for younger patients. This Ross procedure has persisted to the present day.
In the early days of tissue valve development, preservation of the tissue in a exible and durable form was paramount. Alain Carpentier with the assistance of his wife developed the chemistry of valve preservation using glutaraldehyde to x the cross-linkages on the surface of the tissue both removing the allergenicity of the surface protein and maintaining molecular integrity and strength. Working with Edwards, the Carpentier-Edwards valve became a main­stay of tissue valve replacement. The valves were taken from pigs (porcine) and sized with very careful quality control. For every valve accepted, many more were discarded. The valves are hand-sewn into the supporting stents, which are covered with Dacron cloth by workers with immense skill and dedication. The drawback with these valves is the orice area, which is