[Peroperative echocardiography in cardiac surgery]

Area of Science:

• Cardiology
• Cardiac Surgery
• Medical Imaging

Context:

• Echocardiography is crucial for pre-operative cardiac assessment and surgical quality control.
• Intraoperative echocardiography provides real-time insights into cardiac function during surgery.

Purpose:

• To elucidate the role of echocardiography in understanding cardiac function during various surgical stages.
• To investigate the effects of surgical interventions on left ventricular compliance and hemodynamics.

Summary:

• Intraoperative echocardiography demonstrates that ischemic cardiac arrest during cardiopulmonary bypass reduces left ventricular compliance, which potassium-induced cardioplegia can prevent.
• It reveals altered left ventricular pump function post-valve replacement (reduced in regurgitation, increased in stenosis) and hemodynamic disturbances upon pericardium/sternum closure.
• Post-operative studies indicate end-expiratory positive pressure decreases ventricular cavity size.

Impact:

• Echocardiography enhances intraoperative decision-making and improves patient outcomes in cardiac surgery.
• It provides a deeper understanding of cardiac physiology under surgical stress.
• Transesophageal echocardiography shows promise for future studies on regional left ventricular kinetics.