Which technique enables direct access to left atrial pressure during right heart catheterization?

Which technique enables direct access to left atrial pressure during right heart catheterization?

• A. Direct left atrial catheterization via femoral access
• B. Transeptal approach
• C. Retrograde aortic approach
• D. Intracardiac echocardiography

Answer: (B)

Accessing left atrial pressure during a right heart study is achieved by crossing from the right atrium into the left atrium with a transseptal puncture. This transseptal approach lets a catheter be placed directly in the left atrium so the pressure can be measured there. Imaging guidance, such as intracardiac echocardiography, helps locate the fossa ovalis and perform the puncture safely. Other methods either don’t provide direct left atrial access via the venous route or involve an arterial route or purely imaging without recording LA pressure, so they’re not the correct way to obtain direct LA pressure during a right heart catheterization.

Accessing left atrial pressure during a right heart study is achieved by crossing from the right atrium into the left atrium with a transseptal puncture. This transseptal approach lets a catheter be placed directly in the left atrium so the pressure can be measured there. Imaging guidance, such as intracardiac echocardiography, helps locate the fossa ovalis and perform the puncture safely. Other methods either don’t provide direct left atrial access via the venous route or involve an arterial route or purely imaging without recording LA pressure, so they’re not the correct way to obtain direct LA pressure during a right heart catheterization.