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[Impedance cardiography during exercise in the evaluation of left-ventricular function]
Zeitschrift Fur Kardiologie
|June 1, 1984
Summary
Transthoracic impedance cardiography can predict elevated pulmonary artery pressure. The impedance ratio (IQ) accurately identified abnormal pressure, aiding non-invasive assessment of left ventricular function.
Area of Science:
- Cardiology
- Biomedical Engineering
Context:
- Pulmonary artery pressure is crucial for assessing left ventricular function.
- Transthoracic impedance cardiography (TIC) offers non-invasive hemodynamic insights.
Purpose:
- To evaluate TIC's ability to predict elevated pulmonary artery pressure (PAP) at rest and during exercise.
- To compare hemodynamic parameters measured by TIC in patients with normal versus elevated PAP.
Summary:
- In 50 patients, TIC parameters were compared to PAP measurements.
- The impedance ratio O/dz/dtmin (IQ) significantly differed between groups with normal and elevated PAP.
- Elevated PAP during exercise was predicted with 84% accuracy using IQ.
Impact:
- The impedance ratio (IQ) shows potential for non-invasive assessment of left ventricular function.
- TIC provides a valuable tool for predicting pulmonary hypertension non-invasively.