[Preanesthetic evaluation of cardiovascular reserve in a patient with dilated cardiomyopathy]

Area of Science:

• Cardiovascular Anesthesiology
• Critical Care Medicine

Background:

• Anesthetic management for patients with abdominal aortic aneurysm (AAA) and dilated cardiomyopathy (DCM) presents significant challenges due to compromised cardiac function.
• Preoperative assessment of cardiovascular reserve is crucial for predicting patient tolerance to surgical stress.

Observation:

• Transesophageal echocardiography (TEE) and continuous cardiac output (CCO) measurements were utilized for intraoperative hemodynamic monitoring.
• Echocardiographic and hemodynamic data after a 50-meter walk test helped predict allowable ranges for preload, myocardial performance, and heart rate.
• Left ventricular diastolic dimension (Dd) changes promptly reflected alterations in preload compared to pulmonary capillary wedge pressure.

Findings:

• Continuous monitoring of Dd, arterial blood pressure, heart rate, and cardiac output successfully maintained hemodynamic variables within predicted allowable ranges.
• CCO proved effective in detecting abrupt changes in myocardial performance during the procedure.
• TEE monitoring of preload (Dd) and CCO monitoring of myocardial performance allowed for early detection of hemodynamic shifts.

Implications:

• Preanesthetic stress testing can evaluate cardiovascular reserve and predict safe hemodynamic variable ranges for high-risk surgical patients.
• Integrating TEE and CCO monitoring provides a robust strategy for managing complex anesthetic cases involving cardiovascular compromise.
• This approach enhances patient safety by enabling proactive management of hemodynamic instability during major vascular surgery.