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Evaluation of heart dysfunction using non-invasive methods. A comparison between left ventricular end diastolic
1Institute of Clinical Medicine, University of Palermo. aindovin@mbox.unipa.it
Insights
Left ventricular end diastolic diameter, measured by echocardiography, is a reliable indicator of myocardial dysfunction. This method correctly identified dysfunction in 82.35% of patients, unlike end diastolic volume.
Area of Science:
- Cardiology
- Medical Imaging
- Diagnostic Tools
Background:
- Comparison of two cardiac function indices: left ventricular end diastolic volume (LVEDV) via radioisotope angiography and left ventricular end diastolic diameter (LVEDD) via echocardiography.
- Assessment of myocardial function is crucial for diagnosing and managing cardiac conditions.
Purpose of the Study:
- To evaluate and compare the efficacy of LVEDV and LVEDD in identifying myocardial dysfunction.
- To determine which measurement serves as a more reliable index for assessing heart function.
Main Methods:
- Patients were categorized into two groups: those with left ventricular ejection fraction (LVEF) ≥50% (no myocardial dysfunction) and LVEF <50% (myocardial dysfunction).
- Fisher's discriminant analysis was employed for results analysis.
- Student's t-test was used to compare LVEDV and LVEDD between the two patient groups.
Main Results:
- Left ventricular end diastolic diameter (LVEDD) correctly classified 82.35% of patients with myocardial dysfunction.
- Left ventricular end diastolic volume (LVEDV) correctly classified only 41.18% of patients.
- A significant difference (p < 0.05) was found in transverse LVEDD between patients with and without myocardial dysfunction, while LVEDV showed no significant difference.
Conclusions:
- Transverse left ventricular end diastolic diameter (LVEDD) is a reliable and effective index for detecting myocardial dysfunction.
- Echocardiography-derived LVEDD offers superior diagnostic accuracy for myocardial dysfunction compared to LVEDV measured by radioisotope angiography.
Background:
The author aimed to compare two heart function indexes by studying left ventricular end diastolic volume measured using blood pool gated radioisotope angiography, and left ventricular end diastolic diameter measured using echocardiography.
Methods:
The patients were divided into two groups depending on whether left ventricular ejection fraction was greater than or equal to 50% or less than 50%, namely into a group of patients without myocardial dysfunction and one with myocardial dysfunction. The results were analysed using Fisher's discriminant analysis.
Results:
The author observed that 41.18% of patients were correctly classified using the end diastolic volume and 82.35% using transverse end diastolic diameter. Student's "t"-test was also performed on end diastolic volumes in the first and second group, although this was not significant. On the contrary, the "t" test between the transverse end diastolic diameters of patients in the first and second group was significant with p < 0.05.
Conclusions:
The author concludes that the end diastolic transverse diameter of the left ventricle is a reliable index of myocardial dysfunction.
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