METHOD FOR ESTIMATION OF HEART TOLERANCE TO PHYSICAL LOAD AND MONITOR Russian patent published in 2017 - IPC A61B5/452 A61B5/205 

FIELD: medicine.

SUBSTANCE: patient's heart rate is continuously recorded. The value of patient's heart rate variability indicator is determined in time interval T_V according to the claimed formula. Simultaneously, mechanical acceleration of patient's movements is recorded continuously using a three-component accelerometer placed near the body center of gravity. The value of the magnitude of mechanical work A spent by the patient due to his motor activity is determined in interval T_A, according to the claimed formula. The value of W_M index and the current value W_t of heart tolerance to physical activity are determined by the formula. For W_t≈0 a signal about reaching the limit of heart tolerance to physical exertion is generated. The wearable tolerance monitor implements the proposed method. It contains a pulse recorder, the first and the second single-channel analog-to-digital converters (ADCs), an R wave exciter, a microprocessor with random access memory (RAM), a raw data input unit, an accelerometer, a microprocessor controlled multiplexer, an acoustic indicator. At that, the pulse recorder is connected to the microprocessor via the first ADC connected in series and R wave exciter. The accelerometer is connected to the microprocessor via serially connected multiplexer and the second ADC. The raw data input unit, the acoustic indicator and the multiplexer control signal input are connected directly to the microprocessor.

EFFECT: group of inventions allows to assess the heart's tolerance to physical exertion through continuous monitoring of pulse values, determination of the limit of heart tolerance to exercise and signaling its approach to the tolerance limit.

1 dwg, 1 tbl