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Hemodynamic changes during retrograde left-heart catheterization in patients with aortic stenosis
I Tamari1, J S Borer, H L Goldberg
1Division of Cardiology, Cornell University Medical College, New York, N.Y.
Cardiology
|January 1, 1991
Summary
Accurate measurement of right-heart pressures in aortic stenosis patients requires avoiding catheter placement across the aortic valve. Transaortic catheterization can falsely elevate pulmonary artery pressures, impacting surgical risk assessment.
Area of Science:
- Cardiovascular Medicine
- Hemodynamics
- Cardiac Catheterization
Background:
- Pulmonary artery pressures are crucial for assessing prognosis and surgical risk in patients with aortic stenosis.
- Simultaneous measurement of right- and left-heart pressures is ideal, but catheter placement across the aortic valve may interfere with readings.
Purpose of the Study:
- To evaluate the effect of transaortic valvular catheter placement on right- and left-heart pressures in patients with and without aortic stenosis.
- To determine the accuracy of hemodynamic measurements in the context of aortic stenosis.
Main Methods:
- Right- and left-heart pressures were recorded in 51 patients (30 with aortic stenosis, 21 without).
- Measurements were taken before and after retrograde crossing of the aortic valve with a catheter.
- Pulmonary artery pressure and pulmonary capillary wedge pressure were analyzed.
Main Results:
- In patients with aortic stenosis, mean pulmonary artery pressure significantly increased (average 4 mm Hg) after catheter placement across the valve (p < 0.001).
- No significant change in mean pulmonary artery pressure was observed in patients without aortic stenosis (average 0 mm Hg).
- Similar trends were noted for mean pulmonary capillary wedge pressure; changes did not correlate with stenosis severity or left ventricular function.
Conclusions:
- Transaortic valvular catheter placement can artificially elevate pulmonary artery pressures in patients with aortic stenosis.
- Accurate hemodynamic assessment for aortic stenosis requires measuring right-heart pressures without the catheter crossing the stenotic valve.
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