Surgical Procedures and Complications
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1 Radiological Society of North America, RSNA 2013 Refresher Course Program: Vascular Track Surgical Procedures and Complications Learning objectives Outline RC 112 : Key Concepts: Surgical Procedures and Complications Dominik Fleischmann Department of Radiology Stanford University Epidemiology / Etiology Surgical anatomy of thoracic aorta Clinical topics spectrum of TA aneurysms surgical procedures pre- / postoperative imaging Thoracic Aortic Aneurysms (TAA) (from Greek ανευρυσμα, a dilatation) Incidence: TAA: 6 / 100,000 (<10% of aortic aneuryms) Natural history / prognosis rupture in 32-68% of untreated pts rupture mortality 54% (6h), 76% (24h) initial size is only independent predictor of rate of growth and rupture < 5 cm diameter 'low risk' < 2.75cm/m 2 BSA: less than 4% annual risk Thoracic Aortic Aneurysms (TAA) Etiology and associated conditions atherosclerotic genetic (congenital wall defect) Bicuspid aortic valve chronic dissection infectious ('mycotic', syphilis) vasculitis post-traumatic very common rare Atherosclerotic (degenerative) Aneurysm 75 y o woman w. atherosclerotic aneurysm of the thoracic aorta (normal root) Descending TAA 1
2 33 yo woman Disesase gated chest BAV disease (bicuspid aortic valve disease) Aortic root aneurysm Thoracic Aortic Aneurysms (TAA) Etiology and associated conditions Thoracic Aortic Aneurysms (TAA) Etiology and associated conditions atherosclerotic atherosclerotic genetic (congenital wall defect) Bicuspid aortic valve very common genetic (congenital wall defect) Bicuspid aortic valve aortic root aneurysms chronic dissection chronic dissection infectious ('mycotic', syphilis) infectious ('mycotic', syphilis) vasculitis post-traumatic rare vasculitis post-traumatic rare Surgical Procedures and Complications Learning objectives Outline Surgical Anatomy Aortic Isthmus Epidemiology / Etiology Surgical anatomy of thoracic aorta Clinical topics Aortic spindle (ductus bump) spectrum of TA aneurysms surgical procedures pre- / postoperative imaging 2
3 Surgical Anatomy Surgical Anatomy Transverse Arch Surgical Anatomy 73 y/o retired RN ascending aortic aneurysm Sinotubular junction Sinuses of Valsalva aortic valve coronary ostia Aortic anulus Sino-tubular Junction Sinuses of Valsalva Aortic Anulus 73 y/o retired RN ascending aortic aneurysm 73 y/o retired RN ascending aortic aneurysm, root dilatation MIP (thin-slab) centered at valve MIP (thin-slab) centered at valve 3
4 Preoperative and post-operative Aorta: 3D measurements and documentation 3D thoracic Aorta VR (candy-cane view) Measurements MIP (5mm) ~ a-p MIP (5mm) ~ lat. (MPR othogonal) Coronary Anatomy VR Sinuses + valve VR 'transparent' MinIP (inverted) 3 Chamber view Surgical Procedures and Complications Learning objectives Outline Epidemiology / Etiology Surgical anatomy of thoracic aorta Clinical topics spectrum of TA aneurysms surgical procedures pre- / postoperative imaging Surgical Terminology anulo-aortic ectasia (>27) aortic root aneurysm if SOV, STJ (>40 mm) anulo-aortic ectasia aortic root aneurysm SOV, STJ Sinus of Valsalva aneu. (peds./congenital; in adults inflammatory) 41 yo man Anuloplasty Contains valve Coronary reimplant. ANTICOAGULATION 4
![2)x0.67]+(2 Ao](/docs-images/76/74349584/images/5-15.jpg "wall ) POST-OP -")
5 Valve Sparing Procedures Tirone David- I Reimplantation Technique Anuloplasty Contains valve Coronary reimplantation Resect sinuses down to valve insertions Preserve (resuspend) native valves Coronary reimpl. 'Yacoub' 41 yo man Surgical procedure Estimate correct anulus diameter (d): d=(h leaflet 1.35) * e.g. 18mm leaflet: 24mm anulus *mod. from David & Feindel (1992): d=[(h leaflet 2)x0.67]+(2 Ao wall ) POST-OP - synthetic bioprosthetic pulm. Autograft (Ross Procedure) Homograft (cadaver) Xenograft (porcine) 5
6 32 y/o man, st.p. remote Ross (pulm.-to-aortic autograft) - synthetic bioprosthetic pulm. Autograft (Ross Procedure) Homograft (cadaver) Xenograft (porcine) Decellularized cryopreserved aortic homograft J Thor Cardiovasc Surg synthetic bioprosthetic pulm. Autograft (Ross Procedure) tube graft Homograft (cadaver) Xenograft (porcine) Medtronic 'Freestyle' porcine root graft tube graft arch reconstruction w island / peninsula for supraaortic vessels tube graft arch reconstruction w island / peninsula for supraaortic vessels limbed graft limbed graft 6
7 + asc.+arch reconstr. + elephant trunk repair anticipated 52 y/o woman with giant cell arteritis aortic root, ascending, arch and descending aneurysm 52 y/o woman with giant cell arteritis st.p. freestyle root, ascending and total arch repair, + elephant trunk 52 y/o woman with giant cell arteritis st.p. freestyle root, ascending and total arch repair, + elephant trunk 52 y/o woman with giant cell arteritis st.p. freestyle root, ascending and total arch repair, + elephant trunk perfusion limb (graft) elephant trunk 7
8 30 y/o woman, Marfans, chronic dissection, TAAA Aneurysm opened 62 y/o man s/p remote repair of ascending ao s/p enlarging pseudoaneurysm of transverse aorta recent surg. revision assess aortic graft surgical site Post-op Evaluation descending TA, viewed from left lateral thoracotomy Left ventricular pseudoaneurysm (at cannulation site for air evacuation after cardiocirc. bypass) Post-op Cardiac Evaluation Post-surgical Imaging know procedure: leaks/dehiscence always at anastomosis non-contrast scan: felt pledgets, strips, calcifications ECG gating: if root involved, cine may be helpful Pseudoaneurysm of the aorta after surgical repair s/p Ross procedure (pulmonary-to-aorta autograft) suspected leak/pseudoaneurysm on TEE diastole systole 8
9 Surgical Procedures and Complications Summary Radiological Society of North America, RSNA 2013 Refresher Course Program: Vascular Track Epidemiology / Etiology Surgical anatomy of thoracic aorta Clinical topics spectrum of TA aneurysms surgical procedures pre- / postoperative imaging Thank you... DC Miller RS Mitchell M Fischbein 9
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