DIAGNOSTIC TECHNIQUE AND CLASSIFICATION OF LEFT VENTRICULAR REMODELING Russian patent published in 2020 - IPC A61B5/00 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to instrumental diagnostics in cardiology. A left ventricular end-diastolic volume (IEDV LV) index is defined as a ratio of end-diastolic left ventricular volume (EDV LV) to body surface area (BSA). Total thickness of LV (WTT LV) walls is determined as sum of thickness of interventricular septum (IVS) and back wall of left ventricle (BWLV). If WTT LV is not more than 2.2 cm and IEDV LV is lower than lower limit of norm, geometric model "concentric remodeling" is determined. If IEDV LV within limits of norm limits geometrical model "proportional model" is determined. If IEDV LV is above upper limit of norm, geometric model "eccentric remodeling" is determined. If WTT LV is more than 2.2 cm and IEDV LV is lower than the lower limit of norm, a geometric model "concentric hypertrophy" is determined. If IEDV LV within the boundaries of the norm, a geometric model "proportional hypertrophy" is determined. If IEDV LV is above upper limit of norm, geometric model "eccentric hypertrophy" is determined. Then presence and degree of left ventricular hypertrophy or its absence by left ventricular myocardium mass index (MMI LV) is determined. When MMI LV is not more than 95 g/m² for females and 115 g/m² "HLV-" index is added to the name of the geometric model for men. With MMI LV in range of 96–108 g/m² for females and 116–131 g/m² "HLV+" index is added for men. With MMI LV in range of 109–121 g/m² for females and 132–148 g/m² "HLV++" index is added for men. With MMI LV more than 121 g/m² for women and more than 148 g/m² men are added with index "HLV+++".

EFFECT: method enables the accurate, complete and brief description of the left ventricular remodeling behavior by including all the main LV structure variation options into the classification, which enables to more accurately characterize the patient's condition.

1 cl, 1 tbl, 10 ex