What question did this study set out to answer?

This research aims to measure left ventricular volume in rats using a miniaturized conductance catheter.

April 1, 1996AJP Heart and Circulatory Physiology

Left ventricular volumetric conductance catheter for rats

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Why the study?

Does a miniaturized six-electrode conductance catheter accurately measure left ventricular volume in rats compared to an electromagnetic flow probe?

Population

Rats (n=9 total; 6 for stroke volume comparison, 3 for pressure-volume relationship assessment)

Comparison

Miniaturized six-electrode conductance catheter… vs Electromagnetic flow probe placed on the…

Design

Preclinical

Authors

HIHiroshi ItoKanazawa University MTMiyako TakakiNara Medical University HYHiroki YamaguchiShowa University

Discussion

Member takes

Implication

Validates conductance catheter for rat LV volumetry; leaves open clinical translation pending human studies.

Key Points

This research aims to measure left ventricular volume in rats using a miniaturized conductance catheter.
Developed a 3-F conductance catheter for LVV measurement in rats.
Simultaneously measured stroke volumes with the conductance catheter and electromagnetic flow probe.
Evaluated pressure-volume relationships using a catheter-tip micromanometer.
Achieved a high correlation (r = 0.982) between stroke volumes measured by different methods.
Found that Emax decreased after propranolol administration without changes to volume intercept.
Demonstrated the effectiveness of conductance volumetry for assessing cardiac function in rats.

Structured PICO

Does a miniaturized six-electrode conductance catheter accurately measure left ventricular volume in rats compared to an electromagnetic flow probe?

Population

Rats (n=9 total; 6 for stroke volume comparison, 3 for pressure-volume relationship assessment)

Intervention

Miniaturized six-electrode conductance catheter (3-F) introduced into the left ventricle through the apex

Comparator

Electromagnetic flow probe placed on the ascending aorta

Outcome

Correlation of stroke volumes measured by the conductance catheter versus the electromagnetic flow probesurrogate

The miniaturized six-electrode conductance catheter provides an accurate method for continuous measurement of left ventricular volume and pump function in rat models.

Cite This Study

Ito et al. (1996) studied this question.

synapsesocial.com/papers/6a71466e2163a0a01bc56e7e https://doi.org/10.1152/ajpheart.1996.270.4.h1509

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Left ventricular volumetric conductance catheter for rats

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Left ventricular volumetric conductance catheter for rats

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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Also Consider