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Hemodynamic effects of high versus low-osmolar contrast media for ventriculography in severe aortic stenosis
1Division of Cardiovascular Medicine, University of Florida, Gainesville.
Insights
High-osmolar contrast media (diatrizoate meglumine/sodium) significantly altered hemodynamics during left ventriculography in patients with severe aortic valve stenosis. Low-osmolar contrast media (iopamidol) demonstrated a safer hemodynamic profile, suggesting it may be preferable.
Area of Science:
- Cardiovascular Medicine
- Radiology
- Pharmacology
Background:
- Severe aortic valve stenosis presents significant hemodynamic challenges.
- Contrast media used in left ventriculography can impact cardiac function.
- Understanding the hemodynamic effects of different contrast agents is crucial for patient safety.
Purpose of the Study:
- To compare the hemodynamic effects of high-osmolar contrast (diatrizoate meglumine/sodium) versus low-osmolar contrast (iopamidol) during left ventriculography.
- To evaluate the safety profile of these contrast agents in patients with severe aortic valve stenosis.
Main Methods:
- A comparative study involving 15 patients with severe aortic valve stenosis.
- Hemodynamic parameters were monitored following administration of diatrizoate meglumine/sodium and iopamidol.
- Patients were matched for key clinical characteristics to ensure comparability.
Main Results:
- Diatrizoate meglumine/sodium administration was associated with a 22% heart rate increase and a 27% decrease in left ventricular systolic pressure.
- Iopamidol administration resulted in a smaller 9% heart rate increase and a 6% decrease in left ventricular systolic pressure.
- Left ventricular end-diastolic pressure changes were also less pronounced with iopamidol compared to diatrizoate meglumine/sodium.
Conclusions:
- Iopamidol demonstrates a more favorable hemodynamic profile compared to diatrizoate meglumine/sodium in patients with severe aortic valve stenosis.
- Low-osmolar contrast media like iopamidol may be a safer choice for left ventriculography in this patient population.
Abstract:
The hemodynamic effects of high- (diatrizoate meglumine/sodium) and low- (iopamidol) osmolar contrast administration for left ventriculography were compared in 15 patients with severe aortic valve stenosis. Patients were similar with respect to aortic valve gradient, aortic valve area, age, body surface area, and baseline hemodynamics as well as associated coronary disease and valvular insufficiency. Administration of diatrizoate meglumine/sodium was associated with a 22% increase in heart rate, and marked (27%) decrease in left ventricular systolic pressure, with a small (15%) increase in left ventricular end diastolic pressure. In contrast, administration of larger volumes of iopamidol was associated with only a slight (9%) increase in heart rate, a small (6%) decrease in left ventricular systolic pressure, and a smaller (6%) increase in left ventricular end diastolic pressure. In patients with severe aortic valve stenosis iopamidol may offer a safer hemodynamic profile than diatrizoate meglumine/sodium.