Navigating the Unexpected: Right Aortic Arch Unveiled During Left Heart Catheterization

Area of Science:

• Cardiology
• Radiology
• Congenital Anomalies

Background:

• A right aortic arch (RAA) is a rare congenital anomaly, with some variants forming a vascular ring that can cause severe symptoms.
• Left heart catheterization (LHC) is a standard diagnostic procedure for assessing cardiac conditions.

Observation:

• An incidental finding of RAA occurred during LHC in a 68-year-old female presenting with angina.
• The LHC procedure was complicated by an unusual guide wire course, leading to the identification of RAA via contrast injection.
• Aortic computed tomography angiography (CTA) confirmed the RAA with mirror-image branching.

Findings:

• Abnormal aortic arch branching patterns, such as RAA, pose significant challenges for vascular access during cardiac catheterization.
• The choice of access site (e.g., right vs. left radial artery) and angiographic views (e.g., right anterior oblique) are critical for successful procedures in patients with aortic arch anomalies.
• CTA and magnetic resonance angiography (MRA) are essential for confirming aortic arch anomalies.

Implications:

• Accurate identification of aortic arch anomalies like RAA is crucial for interventional cardiologists to anticipate and manage procedural challenges.
• Awareness of potential difficulties during LHC in patients with RAA can lead to improved patient outcomes.
• This case emphasizes the importance of advanced imaging techniques in diagnosing and characterizing complex congenital cardiovascular variations.