2D Cardiac Chamber Examination Cheat Sheet

This cheat sheet outlines the key views and transducer positions for a comprehensive 2D echocardiographic examination of the heart's chambers, valves, and major vessels.

Core Principles

• Understand the goal: complete ultrasound interrogation of cardiac structures.
• Proper transducer positioning is crucial for optimal imaging.
• Marker dot direction aids in orientation within the cardiac anatomy.
• Each view visualizes specific structures and is used to assess particular pathologies.
• Familiarity with standard views (parasternal, apical, subcostal, suprasternal) is essential.

Action Steps

• Begin the examination with the patient in the left lateral decubitus position.
• Orient the transducer to visualize the long axis of the left ventricle in the parasternal long-axis view.
• Adjust probe angulation and rotation to obtain specific views like RV inflow, outflow, and short-axis.
• Move to apical views by positioning the transducer at the apex of the heart.
• Utilize subcostal views by placing the transducer below the xiphoid process.
• Employ suprasternal views for imaging the aortic arch and great vessels.
• Correlate visualized structures with their known anatomical locations and functions.
• Assess for abnormalities such as valve defects, chamber enlargement, and wall motion abnormalities.

Key Terms

• PLAX: Parasternal Long-Axis View
• PSAX: Parasternal Short-Axis View
• RVOT: Right Ventricle Outflow Tract
• LVOT: Left Ventricle Outflow Tract
• RWMA: Regional Wall Motion Abnormality
• IVC: Inferior Vena Cava
• ASD: Atrial Septal Defect

Pro Tips

• Tilt the transducer slightly downwards in PLAX RV inflow view for better visualization.
• Rotate the transducer 90 degrees clockwise from PLAX to obtain the Parasternal Short Axis View (PSAX).
• Use the apical 4-chamber view as a reference for other apical views.
• In subcostal views, the liver acts as an acoustic window.
• The 'crab view' is another name for the suprasternal short-axis view.

Pitfalls to Avoid

• Incorrect transducer angulation can lead to foreshortened or incomplete views.
• Misinterpreting the marker dot direction can result in anatomical confusion.
• Doppler assessment is limited in PLAX as the beam is perpendicular to flow.
• Artifacts from the diaphragm or liver can obscure structures in subcostal views.
• Patient respiration can significantly affect IVC and atrial visualization.

Real World Examples

• Assessing mitral valve function: PSAX at mitral level visualizes leaflets for stenosis or regurgitation. Apical views help assess mitral valve prolapse.
• Evaluating left ventricular function: PLAX assesses LV dimensions and wall motion. PSAX at mid-level assesses septal and free wall motion.
• Detecting septal defects: Subcostal 4-chamber view is ideal for visualizing atrial and ventricular septa for defects like ASD and VSD.
• Imaging the aortic arch: Suprasternal views (long and short axis) are used to visualize the entire aortic arch and its branches.