TEE-guided management of hemodynamic instability in critically ill patients

Cardiology · Critical Care · Anesthesiology

Hemodynamic instability is a frequent and potentially life-threatening complication in critically ill patients, often presenting as hypotension or shock. It may arise from hypovolaemia, myocardial dysfunction, obstructive pathology or distributive shock, each requiring a different therapeutic approach. Prompt identification of the underlying mechanism is therefore essential to guide fluid resuscitation, vasoactive support and other targeted interventions while avoiding treatments that may worsen cardiovascular compromise. Transthoracic echocardiography (TTE) is generally the initial imaging modality for bedside cardiovascular assessment; however, obtaining adequate views may be challenging in critically ill patients, particularly those receiving mechanical ventilation with high positive end-expiratory pressure. Transoesophageal echocardiography (TEE) offers an alternative bedside approach by providing detailed visualisation of cardiac structures, ventricular function and haemodynamic abnormalities when TTE images are inadequate or inconclusive. TEE can therefore support the timely diagnosis and targeted management of haemodynamic instability in the intensive care setting.[1]Clinical role of TEE in hemodynamic instabilityEvaluation of unexplained shock: TEE can be used when persistent hypotension or shock remains unexplained after initial assessment, particularly when adequate TTE images cannot be obtained. It allows focused evaluation of cardiac function and major structural abnormalities without transporting an unstable patientAssessment of ventricular function: Left ventricular size, systolic function, and regional wall-motion abnormalities can be assessed to identify myocardial dysfunction. Right ventricular dilation or impaired function may indicate acute right-sided pressure overload, including that associated with pulmonary embolismIdentification of obstructive causes: Pericardial effusion with chamber compression may support the diagnosis of cardiac tamponade. TEE can also help assess suspected aortic dissection, intracardiac masses, and other structural causes of impaired circulationEvaluation of volume status: Ventricular filling and changes in cardiac dimensions can contribute to assessment of preload. These findings should be interpreted alongside the clinical examination and dynamic measures of fluid responsiveness rather than being used as isolated indications for fluid administrationGuidance of treatment: Echocardiographic findings can help clinicians determine whether treatment should focus on fluid administration, vasopressor or inotropic support, or urgent intervention for a mechanical cause of shock. Repeat assessment can help evaluate the cardiac response to treatmentA focused approach to TEE-guided assessmentDefine the clinical question: The examination should be directed toward the suspected mechanism of instability, such as left ventricular failure, right ventricular dysfunction, tamponade, or inadequate cardiac fillingIntegrate imaging with hemodynamic data: TEE findings should be interpreted with blood pressure, heart rate, perfusion markers, ventilatory settings, and the response to previous interventionsReassess after intervention: Serial examinations may help identify changes in ventricular performance and guide further treatment when the patient's clinical condition evolvesPractical considerations and limitationsConsiderationClinical relevanceEsophageal pathologyEsophageal stricture, tumor, diverticulum, or perforation may contraindicate probe insertion.Recent gastrointestinal surgery or bleedingRecent upper gastrointestinal surgery and active upper gastrointestinal bleeding require particular caution and may preclude examination.Operator expertiseImage acquisition and interpretation require appropriate training and experience.Scope of examinationA focused, goal-directed study should not be mistaken for a comprehensive diagnostic TEE examination when a broader assessment is clinically required.ConclusionFocused critical care echocardiography is an essential component of contemporary intensive care practice, providing rapid, actionable information to guide the assessment and management of hemodynamic instability. Resuscitative TEE is a focused, goal-directed bedside examination that is particularly valuable when TTE is technically limited, inadequate or impractical. By identifying ventricular dysfunction, obstructive pathology and abnormalities in cardiac filling, TEE can help determine the underlying cause of hemodynamic compromise, guide targeted treatment and support serial reassessment. Its findings should always be interpreted in the context of the patient's clinical condition, with appropriate consideration of operator expertise, procedural risks and the need for complementary investigations.[2]Reference(s):1. Si X, Ma J, Cao DY, et al. Transesophageal echocardiography instead or in addition to transthoracic echocardiography in evaluating haemodynamic problems in intubated critically ill patients. Ann Transl Med. 2020;8(12):785. doi:10.21037/atm.2020.04.09. https://pmc.ncbi.nlm.nih.gov/articles/PMC7333121/2. Teran F, Diederich T, Owyang CG, et al. Resuscitative Transesophageal Echocardiography in Critical Care. J Intensive Care Med. 2025;40(11):1133-1142. doi:10.1177/08850666241272065. https://pmc.ncbi.nlm.nih.gov/articles/PMC12569592/