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- W3142014257 abstract "Radionuclide ventriculography was performed in 15 healthy subjects during quiet breathing and during inspiration against a 24 cm H2O threshold load with a respiratory gating technique. Inspiratory threshold loading caused an inspiratory decrease in ejection fraction from 64% to 59% (p less than .001). Stroke counts proportional to stroke volume decreased by 9.6% (p less than .02) due to an increase in end-systolic counts of 15.9% (p less than .05). End-diastolic counts decreased in four subjects and increased in three subjects, but the mean counts did not change significantly. These findings suggest that negative pleural pressure causes an impediment to left ventricular ejection comparable to an increase in arterial pressure. Respiratory gating of radionuclide ventriculography during loaded breathing is suggested as a controlled stress on the ventricle for diagnostic purposes." @default.
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- W3142014257 date "1984-01-01" @default.
- W3142014257 modified "2023-09-23" @default.
- W3142014257 title "Mechanism of decreased left ventricular stroke volume during inspiration in man." @default.
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