scholarly journals Left Ventricular Volume in Bovines: The Correlation between Teichholz’s Medical Mathematical Method and the Volume of the Truncated Prolate Spheroid

2018 ◽  
Vol 23 (3) ◽  
pp. 50
Author(s):  
José Domingues ◽  
Ravel Coelho ◽  
Francielly Bento ◽  
Brenda Almeida ◽  
Ayanne de Castro
Keyword(s):  
Mathematical Model ◽  
Mathematical Method ◽  
Left Ventricle ◽  
Left Ventricular Volume ◽  
Ventricular Volume ◽  
Prolate Spheroid ◽  
Left Ventricular ◽  
Linear Dimensions ◽  
Lower Volume ◽  
Linear Correlations

The main objective of this article is to determine the existing linear correlation between the real left ventricular volume (RV) from the heart of bovines and the volumes obtained by Teichholz’s mathematical model and the volume of the truncated prolate spheroid (TPS) to identify which model has a higher proximity to the RV. For that, ten silicon rubber molds of the left ventricle (LV) were manufactured, and their real volumes were obtained through Archimedes’ principle, and their linear dimensions were also obtained. These dimensions were used to feed Teichholz’s and the TPS models. It was verified that, for ventricles of lower volume, the models showed relatively close results, and Teichholz’s model was the most accurate one. The TPS method shows a grave accuracy mistake for higher volume ventricles. Besides, both methods showed strong linear correlations with the RV, and both with high significance.

Accuracy of volume measurement of rabbit left ventricle by balloon method

1988 ◽  
Vol 255 (2) ◽  
pp. H394-H396 ◽  
Author(s):  
Y. Goto ◽  
B. K. Slinker ◽  
M. M. LeWinter
Keyword(s):  
Left Ventricle ◽  
Left Ventricular Volume ◽  
Isolated Heart ◽  
Ventricular Volume ◽  
Volume Measurement ◽  
Left Ventricular ◽  
High Pressure Range ◽  
Heart Preparation ◽  
Endocardial Surface ◽  
Formalin Fixed

Although the intraventricular balloon method has been commonly used to measure left ventricular volume of the isolated heart preparation of various animals, the accuracy of the method has not been examined in the ventricle of small animals such as the rabbit. To assess the accuracy of the intraventricular balloon method in measuring left ventricular volume, we measured the space between the balloon inflated in the left ventricle and the endocardial surface in eight Formalin-fixed rabbit left ventricles. The space was only 0.05–0.12 ml (1.5–3.6% of total left ventricular volume) at intraballoon pressures of 40–160 mmHg. However, it increased to 0.37 ml (14.6% of total ventricular volume) with a decrease in pressure to 5 mmHg. We conclude that the intraventricular balloon method accurately measures left ventricular volume in the rabbit, especially in the high pressure range.

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