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Title: Quantitative assessment of the cardiac function in dogs using the apexcardiogram
Author: Scott-Park, Freda Marion
ISNI:       0000 0001 3389 212X
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 1986
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Apexcardiography proved to be a practical, non-invasive method for measuring cardiac function in the dog. Simultaneous recordings of the electrocardiogram, apexcardiogram and phonocardiogram were studied in normal dogs before and after the experimental production of ischaemic heart disease and in naturally-occurring clinical cases of cardiac failure. Recordings of the apexcardiogram were found to have a variable morphology depending on the site of the transducer on the thorax. The optimum site was over the point of maximum apical impulse, between the 5th and 7th ribs in the majority of dogs. The apexcardiogram in dogs after experimental production of ischaemic heart disease and in clinical cases demonstrated few deviations from normal. The abnormalities observed in apexcardiograms from human cardiac patients were not consistently recorded in this study. Qualitative information in apexcardiograms alone does not appear to be a reliable guide to cardiac function in dogs. Simultaneous recordings with ECGs and PCGs provided a temporal relationship which may be used to quantify events of the cardiac cycle. STI were derived and normal values established for both anaesthetised and conscious dogs. The STI in dogs with cardiac malfunction after experimentally-produced ischaemic heart disease showed little deviation from normal. STI were further derived from dogs with heart failure or sub-clinical heart disease and were obtainable in the majority of clinical cases. A significant prolongation of pre-ejection period often accompanied by a decrease in left ventricular ejection time was observed in those dogs considered to have cardiac failure.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Human anatomy & human histology