Radiological evaluation of the cardiac apex in Jamaican children

Area of Science:

• Radiology
• Cardiology
• Anatomy

Background:

• The cardiac apex beat is a key clinical indicator.
• Radiological landmarks are often used to approximate cardiac anatomy.
• Previous studies have explored correlations between clinical and radiological findings.

Purpose of the Study:

• To compare the clinical apex beat location with various radiological points on the cardiac silhouette.
• To determine the most accurate radiological landmark for the cardiac apex.

Main Methods:

• Chest radiographs were analyzed.
• The projected position of the clinical apex beat was compared to specific points on the cardiac outline.
• Statistical correlation was assessed between clinical and radiological measurements.

Main Results:

• A strong correlation was observed between the clinical apex beat and the most lateral point of the left cardiac border.
• No significant correlation was found with the cardiophrenic angle or the inferior aspect of the cardiac diameter.
• The mid-clavicular line is not a reliable upper boundary for normal heart size on radiographs.

Conclusions:

• The lateral aspect of the left cardiac border is the most reliable radiological correlate for the clinical apex beat.
• Radiological assessment of heart size and position should consider limitations of traditional landmarks like the mid-clavicular line.
• Accurate radiological localization of the cardiac apex is crucial for diagnostic interpretation.