371. Case Report: The Curious Case of Obstructive Cardiogenic Shock – Maine Medical Center

CardioNerds Dr. Josh Saef and Dr. Tommy Das join Dr. Omkar Betageri, Dr. Andrew Geissler, Dr. Philip Lacombe, and Dr. Cashel O’Brien from the Maine Medical Center in Portland, Maine to enjoy an afternoon by the famous Portland headlight. They discuss a case of a patient who presents with obstructive cardiogenic shock. Dr. Bram Geller and Dr. Jon Donnelly provide the Expert CardioNerd Perspectives & Review segment for this episode. Dr. Maxwell Afari, the Maine Medical Center cardiology fellowship program director highlights the fellowship program. Audio editing by CardioNerds Academy Intern, student doctor Tina Reddy.



This is the case of a 42 year-old woman born with complicated Tetralogy of Fallot repair culminating in a 29mm Edwards Sapiens (ES) S3 valve placement within a pulmonary homograft for graft failure who was admitted to the cardiac ICU for progressive cardiogenic shock requiring vasopressors and inotropic support. Initial workup showed lactic acidosis, acute kidney injury, elevated NT-proBNP, and negative blood cultures. TTE showed at least moderate biventricular systolic dysfunction. She was placed on furosemide infusion, blood cultures were drawn and empiric antibiotics initiated. Right heart catheterization demonstrated elevated right sided filling pressures, blunted PA pressures with low PCWP, low cardiac index, and low pulmonary artery pulsatility index. Intracardiac echocardiography (ICE) showed a large mass within the ES valve apparatus causing restrictive valve motion with a low gradient across the pulmonic valve in the setting of poor RV function. Angiography revealed a large filling defect and balloon valvuloplasty was performed with immediate hemodynamic improvement. Blood cultures remained negative, she was gradually weaned off of inotropic and vasopressor support, and discharged. Despite empiric treatment for culture negative endocarditis and ongoing anticoagulation, she was readmitted for recurrent shock one month later at which time the pulmonic mass was revisualized on ICE. A valve-in-valve transcatheter pulmonary valve (29mm ES S3) was placed to compress what was likely pannus, with an excellent hemodynamic result and no visible mass on ICE.







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Pearls - Obstructive Cardiogenic ShocK




Tetralogy of Fallot is the most common cyanotic defect and can lead to long term complications after surgical repair including chronic pulmonary insufficiency, RV dysfunction, residual RVOT obstruction and branch pulmonary artery stenoses.



Chronic RV failure may be more indicative of a structural defect and therefore require interventional or surgical management.



Valve thrombosis, infective endocarditis and obstructive pannus formation should be considered in the differential of a patient with obstructive shock with a prosthetic valve.



Bioprosthetic pulmonic valve obstruction may be effectively managed with balloon valvuloplasty in patients who present in acute extremis but TCPV will likely provide a more lasting result.



While valvular gradients are typically assessed via echocardiography, invasive hemodynamics can serve as a critical adjunctive tool in its characterization.




Show Notes - Obstructive Cardiogenic ShocK




Notes were drafted by Drs. Omkar Betageri, Philip Lacombe, Cashel O’Brien, and Andrew Geissler.



What are the common therapies and management for Tetralogy of Fallot?




Tetralogy of Fallot is the most common cyanotic defect in children beyond the age of one year



Anatomic Abnormalities: Anterior and Superior deviation of the conal septum creating a SubAo VSD and encroachment on the RVOT.