When a heart won’t recover after valve surgery: The post-op clues physicians can’t afford to miss
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Early recognition of clinical deterioration and close collaboration among surgeons, anesthesiologists, intensivists, and cardiologists [is] essential.
—Abdul Elnaggar, MD
After cardiopulmonary bypass, some myocardial dysfunction is expected. The dangerous error is calling the problem irreversible before the team has excluded mechanical causes. Valve cases deserve a low threshold for repeat imaging and surgical reconsideration.
A recent malpractice lawsuit involving a teenager whose prosthetic heart valve was allegedly implanted upside down has sparked discussion about how physicians tell the difference between expected post-operative heart dysfunction and a mechanical complication that can be fixed.[]
Related: Doctors told teen she was dying, then a second facility found an upside-down heart valve: Inside this $17M malpractice suitAfter cardiac surgery, especially valve procedures, the heart is often temporarily weak. Cardiopulmonary bypass, cardioplegia, inflammation, electrolyte shifts, and ischemia-reperfusion injury can all reduce cardiac function in the hours after surgery.
A 2025 Signa Vitae review notes that low cardiac output syndrome is a frequent complication after cardiac surgery and may be related to ventricular dysfunction, bleeding, tamponade, or arrhythmias.[]
But what if the patient’s condition is worse than expected? Most patients with routine post-bypass myocardial stunning have a weak ventricle. But the valve appears to function normally. Their blood flow patterns are appropriate. And there’s no obvious structural problem. However, if a patient remains in severe shock, cannot separate from bypass, or deteriorates despite support, assessment of a potential mechanical issue is warranted.
What findings should raise concern?
Several post-operative findings should prompt physicians to look beyond myocardial stunning and search for a correctable cause.
Cardiothoracic surgeon Abdul Elnaggar, MD, at Penn State Heart and Vascular Institute, says, “Persistent hemodynamic instability despite appropriate support may suggest a problem beyond routine post-bypass myocardial stunning. Warning signs include low systemic blood pressure, elevated central venous pressure, poor cardiac output, inadequate oxygen delivery, or difficulty weaning from cardiopulmonary bypass. A requirement for escalating doses of vasopressors or inotropic medications to maintain adequate circulation should also prompt further investigation.”
Another important clue is a new regional wall motion abnormality on echocardiography.[]According to the 2025 American Heart Association scientific statement on intraoperative transesophageal echocardiography, new regional wall motion abnormalities identified after cardiopulmonary bypass may indicate myocardial ischemia and should prompt evaluation for causes such as coronary compromise, air embolism, or technical complications of surgery.
Valve-related findings are also important. High prosthetic gradients, restricted leaflet motion, regurgitation, paravalvular leaks, or abnormal mechanical valve sounds can indicate prosthetic valve dysfunction. According to the European Society of Cardiology, reduced or absent opening and closing sounds from a mechanical valve may signal severe prosthetic obstruction.[]
Tamponade should also remain on the differential. Importantly, post-operative tamponade is often localized rather than presenting as a classic circumferential effusion, making it easier to miss on transthoracic echocardiography.[]
Why TEE matters
Transesophageal echocardiography (TEE) is often the fastest way to determine whether a patient’s deterioration is due to myocardial dysfunction or a structural problem requiring intervention.
The 2020 American Society of Echocardiography guidelines describe intraoperative TEE as a standard diagnostic and monitoring tool in cardiac surgery.[]
An American Heart Association scientific statement notes that intraoperative TEE improves outcomes and lowers mortality in high-risk cardiac surgery, including valve surgeries.[]
In a 2026 PLoS One study of 624 adult cardiac surgery patients, intraoperative TEE findings led to a change in surgical management in 10.58% of cases, with the greatest impact in valve surgery and valve-plus-CABG.[]
“Before leaving the operating room, TEE should confirm that the prosthetic valve is well seated and functioning normally, with appropriate leaflet motion, low transvalvular gradients, and no evidence of obstruction or paravalvular leak. Ventricular function and overall cardiac performance should also be assessed,” Dr. Elnaggar says.
He adds, “[TEE] findings that may require immediate surgical revision include new regional wall motion abnormalities suggestive of coronary artery compromise, restricted prosthetic leaflet mobility, unexpectedly elevated transvalvular gradients, significant paravalvular leak, or other evidence of prosthetic valve dysfunction.”
Related: A woman wins $2.6 million after a cardiac cath procedure led to a series of health issuesWhere non-surgeons fit
After discharge, valve patients will reenter care through cardiology or primary care. In one 9-year valve surgery follow-up study, 66% of locally followed patients were discharged after the 6-week post-op check with no further hospital follow-up, with the authors warning that many were “inappropriately discharged back to their family doctor.”[]
Cardiologists, intensivists, anesthesiologists, and PCPs see these patients after the OR.
“Although most patients recover uneventfully after valve surgery, unexpected complications can occur. Early recognition of clinical deterioration and close collaboration among surgeons, anesthesiologists, intensivists, and cardiologists [is] essential. A systematic and timely evaluation of potential causes typically leads to successful diagnosis and management, resulting in favorable patient outcomes,” Dr. Elnaggar says.