Comparison of low-volume versus standard-volume left ventriculography

Area of Science:

• Cardiology
• Medical Imaging
• Interventional Radiology

Background:

• Left ventriculography is crucial for evaluating cardiac function, wall motion, and mitral regurgitation (MR).
• Standard contrast volumes in ventriculography often lead to ventricular ectopy, hindering interpretation.
• Reducing contrast load is desirable to improve patient safety and procedural success.

Purpose of the Study:

• To compare the incidence of ventricular ectopy and accuracy of ejection fraction (EF) measurements between low-volume and standard-volume left ventriculography.
• To assess the impact of contrast volume on left ventricular end-diastolic pressure (LVEDP) and mitral regurgitation (MR).

Main Methods:

• A prospective, randomized study involving 102 patients, where each patient served as their own control.
• Comparison of standard-volume (15 mL/sec for 3 sec) and low-volume (15 mL/sec for 1 sec) contrast injections during left ventriculography.
• Assessment of left ventricular ejection fraction (EF), LVEDP changes, ectopy incidence, and MR severity.

Main Results:

• Low-volume ventriculography significantly reduced the incidence of ectopy (14% vs. 41%, P < 0.001).
• No significant difference in planimetered EF was observed between low-volume and standard-volume ventriculography (mean difference -2% +/- 19%).
• Both methods increased LVEDP post-injection, with no significant difference attributed to volume.

Conclusions:

• Low-volume ventriculography is a viable alternative to standard volumes, effectively reducing contrast load and ectopy.
• This approach maintains diagnostic accuracy for EF assessment, improving patient safety during cardiac imaging.
• Further adoption of low-volume techniques can enhance the interpretability and safety profile of left ventriculography.