The Conductance Volume Catheter Technique for Measurement of Left Ventricular Volume in Young Piglets
نویسندگان
چکیده
منابع مشابه
Left ventricular volume measurement by conductance catheter in intact dogs. Parallel conductance volume depends on left ventricular size.
The conductance catheter is a promising new instrument for continuously measuring left ventricular (LV) volume. Absolute LV volume (V[t]) is related to uncorrected conductance volume, B(t), according to the equation: V(t) = (1/alpha)(B(t) - alpha Vc). The alpha Vc factor represents parallel-conductance volume due to conducting material outside the LV blood pool, and may be estimated by transien...
متن کاملRight ventricular volume measurement by conductance catheter.
Continuous ventricular volume measurement by the conductance method assumes a homogeneous electrical field dispersed throughout and contained within the ventricle. Because of dense trabeculation and complex geometry, right ventricular (RV) volume description by this method may be seriously compromised. This study sought to determine the accuracy and limitations of RV volume measurement by condu...
متن کاملDetermination of left ventricular end-systolic pressure-volume relationships by the conductance (volume) catheter technique.
Using a multielectrode conductance catheter to estimate continuous left ventricular volume we determined the end-systolic pressure-volume relationship (ESPVR) in situ in open-chest anesthetized dogs. Dogs (n = 8) were studied in the control state and after pharmacologic sympathectomy (hexamethonium) and surgical vagotomy both before and after the administration of dobutamine. ESPVR was measured...
متن کاملLeft ventricular volume measurement in mice by conductance catheter: evaluation and optimization of calibration.
The conductance catheter (CC) allows thorough evaluation of cardiac function because it simultaneously provides measurements of pressure and volume. Calibration of the volume signal remains challenging. With different calibration techniques, in vivo left ventricular volumes (V(CC)) were measured in mice (n = 52) with a Millar CC (SPR-839) and compared with MRI-derived volumes (V(MRI)). Signific...
متن کاملLABORATORY INVESTIGATION VENTRICULAR PERFORMANCE Accuracy of volume measurement by conductance catheter in isolated, ejecting canine hearts
We evaluated the accuracy of the recently reported technique of estimating intraventricular volume by measurement of intracavitary electrical conductance in six isolated, ejecting, canine left ventricles. Left ventricular volumes were measured directly by a previously validated servosystem that employed an electroconductive balloon placed in the left ventricular cavity. The volume measured cont...
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ژورنال
عنوان ژورنال: Pediatric Research
سال: 1992
ISSN: 0031-3998,1530-0447
DOI: 10.1203/00006450-199201000-00016