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Physiology of the artificial heart
Biomaterials, Medical Devices, and Artificial Organs
|January 1, 1975
Summary
Artificial heart pumping causes specific blood damage like hemolysis and liver congestion, not general issues like infection or kidney problems, which stem from implantation artifacts.
Area of Science:
- Biomedical Engineering
- Cardiovascular Research
- Medical Device Technology
Background:
- Previous studies attributed various physiological deviations to artificial heart pumping.
- These deviations included infection, thromboembolism, pulmonary pathology, and renal deterioration.
- The role of experimental artifacts in these observed effects was not fully elucidated.
Purpose of the Study:
- To differentiate between specific effects of artificial heart pumping and nonspecific experimental artifacts.
- To identify the primary causes of blood constituent damage and hepatic congestion.
- To investigate the relationship between hemolysis and specific artificial heart parameters.
Main Methods:
- Analysis of physiological data from artificial heart recipients.
- Correlation analysis to determine relationships between pumping parameters and adverse effects.
- Distinguishing between artifact-induced and device-specific complications.
Main Results:
- Infection, thromboembolism, pulmonary pathology, and renal deterioration were identified as nonspecific artifacts of mechanical heart implantation.
- Damage to blood constituents (hemolysis) and hepatic congestion were confirmed as specific effects of artificial heart pumping.
- Hemolysis showed a strong correlation with pumping sac collapse, low cardiac output, and hematocrit value (r = .912, p < .001).
Conclusions:
- Nonspecific complications associated with artificial hearts are largely due to implantation artifacts.
- Hemolysis and hepatic congestion are direct consequences of artificial heart pumping.
- Hepatic congestion may be linked to 'small atrium syndrome' caused by atrial volume restriction.