2D Cardiac Chamber Examination Cheat Sheet

This cheat sheet outlines the key views and structures examined during a 2D transthoracic echocardiographic examination, detailing transducer positions, marker dot directions, and visualized anatomy for comprehensive cardiac assessment.

Core Principles

• Understand the goal: Complete ultrasound interrogation of cardiac chambers.
• Master transducer positioning for optimal acoustic windows.
• Identify key anatomical structures in each view.
• Recognize the purpose and application of each examination view.
• Correlate visualized structures with potential pathologies.

Action Steps

• Begin examination with the patient in the left lateral decubitus position.
• Place transducer at the left parasternal position.
• Orient the beam along the long axis of the left ventricle for parasternal views.
• Adjust transducer angulation and rotation to visualize specific cardiac structures.
• Utilize marker dot direction to orient the image correctly.
• Systematically assess chambers, valves, and great vessels.
• Employ Doppler for flow assessment where applicable.
• Transition between views (e.g., PLAX to RV inflow) with precise probe movements.
• Confirm anatomical landmarks for accurate interpretation.
• Document findings systematically.

Key Terms

• Transthoracic Echocardiography: An ultrasound examination of the heart performed through the chest wall.
• Parasternal: Refers to views obtained from the area beside the sternum.
• Apical: Refers to views obtained from the apex (bottom tip) of the heart.
• Subcostal: Refers to views obtained from below the rib cage.
• Suprasternal: Refers to views obtained from above the sternum.
• PLAX: Parasternal Long-Axis View.
• PSAX: Parasternal Short-Axis View.
• RVOT: Right Ventricle Outflow Tract.
• IVC: Inferior Vena Cava.
• Situs: The position and arrangement of organs within the body, particularly the heart and abdominal viscera.

Pro Tips

• For PLAX, the marker dot points towards the right shoulder.
• In PSAX, the marker dot points towards the left shoulder.
• Tilting the transducer in PLAX RV inflow view directs the beam slightly downwards.
• High parasternal views visualize structures superior to the standard PLAX.
• RVOT view is obtained by tilting from PLAX and rotating clockwise.
• PSAX at the aorta/pulmonary artery level provides a 'crab view'.
• Apical views offer a different perspective, especially for assessing the apex and walls.
• Subcostal views are useful when parasternal windows are suboptimal.
• Visualize the IVC for diameter and respiratory variation.
• Suprasternal views are key for aortic arch assessment.

Pitfalls to Avoid

• Incorrect transducer angulation leading to foreshortened or incomplete views.
• Misinterpreting the marker dot direction, causing image orientation errors.
• Failure to identify all relevant structures within a given view.
• Overlooking subtle pathologies like small septal defects or valve regurgitation.
• Insufficient patient positioning (e.g., not achieving true left lateral decubitus).
• Inadequate acoustic coupling (poor gel application).
• Mistaking anatomical structures due to poor image quality.
• Not performing sequential views, missing critical information.