Reference values for quantitative left ventricular and left atrial measurements in cardiac computed tomography

Area of Science:

• Cardiovascular Imaging
• Radiology
• Cardiac CT Analysis

Background:

• Accurate reference values are essential for interpreting cardiac CT findings.
• Existing reference values may not adequately account for gender-specific variations in cardiac anatomy and function.
• Standardized quantitative measurements are needed for left ventricular (LV) and left atrial (LA) dimensions, function, and myocardial mass.

Purpose of the Study:

• To establish gender-specific reference values and percentile ranks for LV and LA dimensions, global LV function, and LV-myocardial mass using cardiac CT.
• To provide a normative dataset for quantitative cardiac CT analysis in a low-risk population.

Main Methods:

• Examined 120 low-cardiovascular-risk subjects using 64-slice and dual-source CT.
• Acquired measurements including septal wall thickness (SWT), posterior wall thickness (PWT), LV inner diameter (LVID), LA anterior posterior diameter (LAD(sys)), end-systolic volume (ESV), end-diastolic volume (EDV), and LV-myocardial mass (LVMM).
• Analyzed data for gender- and age-related differences and generated percentile ranks.

Main Results:

• Significant gender-related differences were observed in LV dimensions (SWT, PWT, LVID) and LV-myocardial mass (LVMM).
• Global LV functional parameters (ESV, EDV, SV) showed significant gender differences, but ejection fraction (EF) did not.
• No significant correlation was found between measured parameters and age.

Conclusions:

• This study provides valuable gender-specific reference values and percentiles for quantitative LV and LA measurements derived from cardiac CT.
• These established benchmarks will aid clinicians in the accurate interpretation of cardiac CT results.
• The findings highlight the importance of considering gender in the quantitative assessment of cardiac structures and function via CT.