Evaluation of left ventricular function during roentgen contrast ventriculography.

Area of Science:

• Cardiovascular Physiology
• Diagnostic Imaging Techniques

Background:

• Direct ventriculography involves injecting contrast media into the left ventricular (LV) cavity.
• Intravenous left ventriculography uses contrast media injected into the right atrium.
• Assessing LV function changes during these procedures is crucial for understanding their impact.

Purpose of the Study:

• To evaluate the effects of direct and intravenous left ventriculography on left ventricular function in normal subjects.
• To identify the limitations of direct ventriculography for assessing LV function.
• To propose an alternative method for accurate LV function assessment.

Main Methods:

• Twenty-two healthy individuals were studied.
• Left ventricular pressure was continuously monitored using a microtip manometer catheter during angiography.
• LV images and pressure data were analyzed using a computer system.

Main Results:

• Direct ventriculography caused significant changes in LV diastolic function, increased LV pressure, and altered LV working parameters.
• The mechanical efficiency of LV contraction decreased during direct ventriculography.
• Acute volume overload of the left ventricle was identified as a major limitation of direct ventriculography.

Conclusions:

• Direct ventriculography significantly impacts LV function, primarily due to contrast volume overload.
• Intravenous biventriculography with simultaneous LV pressure recording is a recommended alternative.
• This modified approach can be successfully utilized in clinical research trials for accurate LV function assessment.