title: Rupture of equine pericardial aortic-root patch after aortic valve replacement with aortic annulus enlargement: a case report.
abstract: There are no previous reports of rupture of a heterologous pericardial patch after aortic annulus enlargement. Our patient, a 72-year-old Japanese female, presented with congestive heart failure resulting from heart compression from pseudoaneurysm formation in the aortic root. At 57 years of age the patient had undergone replacement of the ascending aorta for Stanford type A acute aortic dissection. At 66 years of age she had undergone aortic valve replacement with a mechanical valve, accompanied by enlargement of the aortic annulus using an equine pericardial patch, for severe aortic valve stenosis with a narrow aortic annulus. Equine pericardial patch was used in the aortic annulus enlargement to form the aortic root from the ascending aortic vascular prosthesis to the non-coronary cusp of the aortic valve. We performed repeat median sternotomy under cardiopulmonary bypass with moderate hypothermia. The ascending aorta was balloon-occluded because of dense adhesions around the superior vena cava and ascending aorta due to the pseudoaneurysm. A tear in the equine pericardial patch was noted at the aortic root. The patient underwent pseudoaneurysm excision and repair of the aortic root using a double-layered, Hemashield-reinforced bovine pericardial patch. Routine follow-up with computed tomography should be performed for early detection of complications from a heterologous pericardial patch.
authors.affiliation: Department of Cardiovascular Surgery, Osaka City General Hospital, 2-13-22 Miyakojima-hondori, Miyakojima-ku, Osaka 534-0021, Japan. m3_514@yahoo.co.jp.
authors.forename: Akimasa
authors.initials: A
authors.lastname: Morisaki
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Kato
authors.forename: Manabu
authors.initials: M
authors.lastname: Motoki
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Takahashi
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Nishimura
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Shibata
mesh_terms: D000368:Aged; D000818:Animals; D001019:Aortic Rupture / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D001022:Aortic Valve Insufficiency / Q000175:diagnosis / Q000209:etiology* / Q000601:surgery; D001024:Aortic Valve Stenosis / Q000175:diagnosis / Q000601:surgery*; D001705:Bioprosthesis / Q000009:adverse effects*; D002417:Cattle; D003937:Diagnosis, Differential; D017548:Echocardiography, Transesophageal; D005260:Female; D006350:Heart Valve Prosthesis; D006801:Humans; D018810:Magnetic Resonance Angiography; D011475:Prosthesis Failure; D012086:Reoperation; D014057:Tomography, X-Ray Computed