What question did this study set out to answer?

This research aims to evaluate the feasibility of measuring stroke volume and pressure-volume relationships using impedance catheter technology during cardiac catheterization.

April 1, 1984CirculationOpen Access

Instantaneous measurement of left and right ventricular stroke volume and pressure-volume relationships with an impedance catheter.

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Authors

RMRaymond G. McKayInterventional Cardiology JSJenna SpearsMount Sinai Beth Israel JAJulian M. AroestyHadassah Medical Center

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Implication

Randomized trial assesses stroke volume and pressure-volume dynamics in patients, indicating potential clinical use of impedance measurements.

Key Points

This research aims to evaluate the feasibility of measuring stroke volume and pressure-volume relationships using impedance catheter technology during cardiac catheterization.
Assessed continuous intraventricular electrical impedance recording in 12 patients during cardiac catheterization.
Compared stroke volumes from impedance measurements with those from thermodilution in 10 patients, achieving a correlation of r = 0.95.
Evaluated pressure-volume relationships using simultaneous recordings from the impedance catheter and pressure readings.
Beat-by-beat stroke volume decreases were noted during the Valsalva maneuver and following the administration of amyl nitrite.
Excellent agreement was found between impedance recordings and volume curves from radionuclide ventriculography.
Pressure-volume diagrams revealed characteristic phases, including isovolumetric contraction and a linear end-systolic pressure-volume relationship during amyl nitrite administration.

Cite This Study

McKay et al. (1984) studied this question.

synapsesocial.com/papers/6a20527f1ce0fe566a5acafe https://doi.org/10.1161/01.cir.69.4.703

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Implication

Randomized trial assesses stroke volume and pressure-volume dynamics in patients, indicating potential clinical use of impedance measurements.

Instantaneous measurement of left and right ventricular stroke volume and pressure-volume relationships with an impedance catheter.

Discussion

Member takes

Implication

Key Points

Cite This Study

Instantaneous measurement of left and right ventricular stroke volume and pressure-volume relationships with an impedance catheter.

Discussion

Member takes

Implication

Key Points

Cite This Study

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