METHOD OF ASSESSING PRESENCE OF THINNED AREA OF INFERIOR WALL OF LEFT ATRIUM Russian patent published in 2024 - IPC A61B5/107 

FIELD: medicine; normal human anatomy.

SUBSTANCE: after making a preparation of a normal heart with the left atrium in the diastole phase, the following are measured with calipers: the length of the heart — X₁, the width of the heart — X₂, measured directly below the coronary sulcus and parallel to it, the length of the left atrium —X₃, the width of the left atrium —X₄, the length the left ear of the heart —X₅, the width of the left ear of the heart —X₆ and the thickness of the left ear of the heart —X₇. Then the index of the presence of a thinned area of the lower wall of the left atrium under the mouth of the left inferior pulmonary vein is calculated using the formula: I=1/(1+e^-y), where I is the index of the presence of a thinned area of the lower wall of the left atrium under the mouth of the left inferior pulmonary vein of a normal adult heart; e is natural logarithm base 2.71; (-Y) is binary logistic regression equation, the power to which the base of the natural logarithm is raised: Y=4,78+0,029X₁+0,16Х₂-0,28Х₃-0,12X₄+0,5X₅+0,19Х₆-0,07Х₇. When the value I≥ is 0.5 it is concluded that there is a thinned area of the lower wall of the left atrium under the mouth of the left inferior pulmonary vein on a preparation of a normal adult heart. An objective assessment is given of the presence of a thinned area of the lower wall of the left atrium under the mouth of the left inferior pulmonary vein on a preparation of a normal adult heart with completely intact walls of the left atrium.

EFFECT: method makes it possible to obtain an objective assessment of the presence of a thinned area of the lower wall of the left atrium under the mouth of the left inferior pulmonary vein in a normal adult heart while maintaining the integrity of the walls of the left atrium, which is in the diastole phase.

1 cl, 3 ex