[A semi-quantitative programme for evaluating radio-ventriculograms by a "first passage" technique (author's transl)]

Area of Science:

• Cardiology
• Medical Imaging
• Nuclear Medicine

Background:

• Accurate assessment of regional cardiac function is crucial for diagnosis and treatment.
• Evaluating atrioventricular (AV) valve insufficiency requires specialized techniques.
• Ejection fraction is a key metric for cardiac performance.

Purpose of the Study:

• To present a specialized technique for demonstrating and measuring AV valve insufficiency.
• To evaluate the agreement of this technique with single-plane angiography for ejection fraction measurement.
• To assess the inter-observer variability of the technique.

Main Methods:

• Utilized a special technique for regional cardiac function assessment, including scintigraphy.
• Demonstrated and measured AV valve insufficiency.
• Compared results with single-plane angiography, analyzing ejection fraction in patients with and without valvular disease.
• Evaluated inter-observer error.

Main Results:

• The technique effectively demonstrates regional cardiac function (muscle movement, contraction volume, trend scintigram).
• Good or excellent agreement was found between the technique and single-plane angiography for ejection fraction (r = 0.86 in sinus rhythm, r = 0.92 in non-valvular disease).
• Inter-observer error was very small (r = 0.99).

Conclusions:

• The specialized technique is reliable for assessing regional ventricular function and AV valve insufficiency.
• It provides accurate ejection fraction measurements comparable to angiography.
• The method is highly reproducible with minimal inter-observer error, suitable for separate right and left ventricle evaluation.