METHOD FOR STRUCTURE FUNCTIONAL HEART STUDY AND CHRONIC CARDIAC FAILURE DIAGNOSIS BY MEANS OF HIGH-FREQUENCY ELECTRICAL IMPEDANCE ANALYSIS Russian patent published in 2015 - IPC A61B5/53 

FIELD: medicine.

SUBSTANCE: method consists in diagnosing chronic cardiac failure. The diagnostic procedure involves using the high-frequency electrical impedance analysis. Bipolar measurements of electrical impedance of the chest involve recording average modular impedance |Z| and phase angle φ, and calculating the relation |Z|/|φ|. The measurements taken involve probing with AC current at frequencies 50, 100, 200 and 500 kHz. That implies using electrocardiographic electrodes 21 mm in diameter. The first electrode is placed in the 3rd intercostal space along the left parasternal line. The second one is placed series in three positions. For the first time, the second electrode is placed in the 2^nd intercostal space along the left sternal line, lead 3-2. Then, in the 3^rd intercostal space along the right parasternal line, lead 3-3. Thereafter in the 5^th or 6^th intercostals space on the left in a projection of apex beat, lead 3-5. Decreasing angle φ modulus at frequency 200 kHz in lead 3-2 less than 34°, and/or increasing the relation |Z|/|φ| measured at frequency 200 kHz in lead 3-3 more than 15, and/or decreasing the relation |Z|/|φ| measured at frequency 200 kHz in lead 3-5 less than 10 enable diagnosing chronic cardiac failure.

EFFECT: method increases the diagnostic accuracy ensured by measuring combined with recording the above parameters.

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