Brazil, at the heart treatment center of St. Sao Paulo hospital.
Dr. Domingo Paul personally collected various data and made a preoperative assessment.
It was like doing a math problem. First of all, a person needed to calculate the amount of cardiac muscle to be removed through various clinical values.
According to the law of clapplace: T= 2p ×R, which meant that the larger the volume and diameter, the higher the liquid tension (P), and the higher the container tension (T).
After examining a large number of animal heart samples and human heart samples with dilated cardiopathy, Baptista came to a similar conclusion. M=4.18×R3, where M is the left cardiac wall tension, and R is the left cardiac diameter.
