Related Experiment Videos
Correlation between chest film and angiographic assessment of left ventricular size
Insights
Plain chest X-rays can effectively detect left ventricular enlargement. Heart volume on chest films is the best single measurement for identifying left ventricular enlargement in patients with aortic valve disease.
Area of Science:
- Cardiology
- Radiology
- Medical Imaging
Background:
- Left ventricular enlargement is a key indicator of cardiac disease.
- Accurate detection of left ventricular enlargement is crucial for patient management.
- Plain chest radiography is a widely accessible imaging modality.
Purpose of the Study:
- To compare quantitative angiographic measurements of left ventricular size with standard plain chest film measurements.
- To evaluate the effectiveness of various chest film parameters in detecting left ventricular enlargement.
Main Methods:
- Quantitative angiographic measurements of left ventricular size were obtained.
- Twelve plain chest film measurements of heart size and shape were analyzed.
- Statistical analysis, including correlation and stepwise discriminant analysis, was performed.
Main Results:
- Plain film heart volume showed the highest correlation with left ventricular volume and mass in patients with hypertrophy and dilatation (r = .66).
- In the hypertrophy group, plain film heart volume was the most sensitive detector (21% false negative rate).
- A combination of chest film variables reduced the false negative rate to 5% in the hypertrophy group.
Conclusions:
- Plain film heart volume is the best single measurement for detecting left ventricular enlargement.
- Chest radiography provides a valuable, non-invasive method for assessing left ventricular size.
- Multivariate analysis of chest film parameters can further improve detection accuracy.
Abstract:
In 76 adult males quantitative angiographic measurements of left ventricular size were compared to 12 plain chest film measurements of heart size and shape. Of the 18 normal cases, only Rigler's B measurement correlated with left ventricular volume (r = .64). However, this correlation was not statistically significant. Of the 58 patients with isolated aortic valve disease, 19 had increased left ventricular mass (hypertrophy) and 39 had both increased left ventricular end-diastolic volume and mass (hypertrophy and dilatation). In the hypertrophy group, plain film heart volume was the most sensitive detector of an enlarged left ventricle (21% false negative rate) and correlated with left ventricular end-diastolic volume (r = .62). Using stepwise discriminant analysis, the combination of heart volume, leftness of the heart, apex position, and roundness of the left ventricle decreased the false negative rate to 5%. In the hypertrophy and dilatation group, plain film heart volume had the highest correlation with left ventricular volume and mass (r = .66) and a false negative rate of 8%. No single variable or combination of variables could usefully discriminate between the hypertrophy and hypertrophy and dilatation groups. These data support the conclusion that plain film heart volume is the best single measurement for detecting left ventricular enlargement.