Assessment of the clinical value of impedance pulmonary rheogram in the early diagnosis of cor pulmonale

Abstract

The impedance pulmonary rheogram (IPR) and its first derivation of 83 patients with chronic cor pulmonale (CCP) and 50 healthy persons were measured and analyzed. The results indicated that the following parameters are valuable in the diagnosis of CCP: 1. Q-b interval ≥ 0.15 sec; 2.RVET ≤ 0.28 sec; 3. Q-b/RVET ratio ≥ 0.46; 4. Q-b index ≥ 0.17; 5. Q-C interval ≥ 0.20 sec; 6. wave amplitude ≤ 0.15 ohm. When any three of the above-mentioned six indices are positive, the patient may be diagnosed as CCP. According to this standard the rate of early diagnosis of CCP was 73.6%.

Keywords

impedance pulmonary rheogram / chronic cor pulmonale

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