Intraoperative accurate assessment of septal myectomy for hypertrophic obstructive cardiomyopathy (HOCM)

Area of Science:

• Cardiovascular Surgery
• Cardiology
• Medical Devices

Background:

• Surgical intervention for hypertrophic obstructive cardiomyopathy (HOCM) aims to relieve left ventricular outflow tract (LVOT) obstruction.
• Accurate intraoperative assessment of the LVOT gradient is crucial after septal myectomy.
• Current methods like transesophageal echocardiography (TEE) and direct needle measurements have limitations.

Purpose of the Study:

• To present a new, simplified technique for intraoperative estimation of the LVOT peak-to-peak pressure gradient.
• To offer an alternative to existing invasive and non-invasive measurement methods.

Main Methods:

• Implementation of a novel technique using a single double lumen central venous catheter.
• Catheter insertion through the antegrade cardioplegia site, crossing the aortic valve into the left ventricle.
• Intraoperative estimation of the pressure gradient between the left ventricle and aorta.

Main Results:

• The described technique allows for direct intraoperative pressure gradient measurement.
• This method potentially simplifies the assessment of LVOT gradient post-myectomy.
• It offers a single-catheter approach, potentially reducing procedural complexity.

Conclusions:

• A new technique using a double lumen central venous catheter can effectively estimate intraoperative LVOT gradients in HOCM patients.
• This method provides a viable alternative for gradient assessment after septal myectomy.
• Further studies may validate its widespread clinical application.