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The normal adult MV area is 4–6 cm2. Unlike other heart valves, the MV consists of two asymmetric leaflets. The aortic (anterior) leaflet makes up 65% of the valve area but its base forms only 35% of the circumference. The mural (posterior) leaflet usually consists of three main scallops, although there may be up to five. The leaflets are joined at the anterolateral and posteromedial ends of the commissure. The aortic MV leaflet shares the same fibrous attachment as the non-coronary cusp of the AV.
Core Topics in Thoracic Surgery provides accessible and concise coverage of the topics most often encountered in thoracic surgery practice. This handbook will guide the reader through revision of the topics covered in the FRCS(CTh) examination, and also covers more specialist topics in detail. In-depth technical sections offer guidance for difficult procedures, with useful commentaries from leading surgeons. A broad range of thoracic surgery issues are examined, with the latest evidence and information relevant to the speciality presented in a clear fashion. Combining an easy-to-use revision guide for trainees and a comprehensive reference text for cardiothoracic surgeons and recently appointed consultants, this is a one-stop guide to thoracic surgery. Authored by leading experts in the field, this resource will be invaluable to cardiothoracic surgeons, respiratory physicians and specialist nurses seeking to refresh or expand their knowledge of this field.
Our aim was to review the outcome of ligation of the persistently patent arterial duct in neonates as performed outside a paediatric cardiothoracic centre by an outreach surgical team.
Methods
A retrospective observational study of all ligations of the persistently patent arterial duct performed in Cambridge between January, 1988, and December, 2002.
Results
Over the period of 15 years studied, a persistently patent arterial duct was ligated in 43 neonates. The median gestational age at birth was 26 weeks, with a range from 23 to 35 weeks, and median weight at birth was 722 grams, with a range from 500 to 2100 grams. Median age at ligation, was 25 days, with a range from 10 to 89 days, and their weight was 963 grams, with a range from 568 to 2221 grams. Ligation was successful in 42 babies (98%), mortality at 30 days of 5%, and 29 of the babies (67%) surviving to be discharged from the hospital. The late deaths were due to complications of prematurity, rather than the procedure of ligation.
Conclusion
The persistently patent arterial duct can successfully be ligated by an outreach surgical team outside a paediatric cardiothoracic centre. There was an excellent 30 day survival.
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