Elevated Transaortic Valvular Gradients After Combined Aortic Valve and Mitral Valve Replacement: An Intraoperative Dilemma. (March 2015)

• Record Type: Journal Article
• Authors: Essandoh, Michael; Portillo, Juan; Zuleta-Alarcon, Alix; Castellon-Larios, Karina; Otey, Andrew; Sai-Sudhakar, Chittoor B.
• Is Part Of: Seminars in cardiothoracic and vascular anesthesia. Volume 19:Number 1(2015:Mar.)
• Page Start: 61
• Page End: 65
• Publication Date: 2015-03
• Subjects: transaortic valve gradients -- bioprosthetic mitral valve -- mitral valve replacement -- aortic valve replacement -- left ventricular outflow tract obstruction -- transesophageal echocardiography -- prosthesis-patient mismatch; Cardiovascular system -- Surgery -- Methods -- Periodicals; Chest -- Surgery -- Methods -- Periodicals; Anesthesia -- Periodicals; Anesthetics -- Periodicals; Anesthesia -- Periodicals; Anesthetics -- Periodicals; Cardiovascular Surgical Procedures -- methods -- Periodicals; Thoracic Surgical Procedures -- methods -- Periodicals; 617.96
• DOI: 10.1177/1089253214564398
• Languages: English
• ISSNs: 1089-2532

Abstract

High transaortic valvular gradients, after combined aortic valve and mitral valve replacement, require prompt intraoperative diagnosis and appropriate management. The presence of high transaortic valvular gradients after cardiopulmonary bypass, in this setting, can be secondary to the following conditions: prosthesis dysfunction, left ventricular outflow tract obstruction, supravalvular obstruction, prosthesis–patient mismatch, hyperkinetic left ventricle from administration of inotropes, left ventricular intracavitary gradients, pressure recovery phenomenon, and increased transvalvular blood flow resulting from hyperdynamic circulation or anemia. Transesophageal echocardiography is an extremely useful tool for timely diagnosis and treatment of this complication. We describe a case of a critically ill patient with endocarditis and acute lung injury, who presented for combined aortic valve and mitral valve replacement. Transesophageal echocardiographic assessment, post–cardiopulmonary bypass, revealed high transaortic valvular gradients due to encroachment of the mitral prosthesis strut on the left ventricular outflow tract, which was compounded by a small, hypertrophied, and hyperkinetic left ventricle. Discontinuation of inotropic support, administration of fluids, phenylephrine, and esmolol led to resolution of the high gradients and prevented further surgery.