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[Apex cardiography calibrated by an infinite-time constant. Technic and methodology]
Giornale Italiano Di Cardiologia
|July 1, 1984
Summary
A novel apexcardiographic transducer system offers precise measurements by controlling thorax coupling pressure (PO). This ensures accurate amplitude and ratio readings, crucial for reliable apexcardiogram and phonocardiogram analysis.
Area of Science:
- Biomedical Engineering
- Cardiovascular Physiology
- Medical Instrumentation
Context:
- Traditional apexcardiography systems lack precise control over thorax coupling pressure.
- Variations in coupling pressure can significantly affect signal transmission and measurement accuracy.
- Accurate non-invasive hemodynamic monitoring is essential for diagnosing cardiac conditions.
Purpose:
- To introduce a new apexcardiographic transducer system with enhanced features.
- To demonstrate the importance of controlling thorax coupling pressure (PO) for accurate measurements.
- To evaluate the performance of the new system against traditional methods.
Summary:
- A novel apexcardiographic transducer system is presented, featuring an infinite time constant, absolute pressure calibration, and measurement of thorax coupling pressure (PO).
- The system utilizes an extensimetric bridge coupled via a plastic cylinder, offering linearity up to 1350 mmHg and a frequency response up to 3500 Hz.
- Simultaneous output of apexcardiogram, its derivative, and phonocardiographic bands is enabled by electronic filtering circuits.
Impact:
- Controlled coupling pressure is vital for both absolute amplitude and accurate amplitude ratio measurements in apexcardiography.
- The new system provides more reliable data by accounting for signal transmission changes across the thorax.
- This advancement can lead to improved diagnostic accuracy and patient monitoring in cardiovascular research and clinical practice.