Method and apparatus for measuring myocardial impairment and dysfunctions from efficiency and performance diagrams
First Claim
1. A cardiac diagnostic device for monitoring a subject, said device including;
- means for measuring physiological parameters of such subject;
means responsive to measurements of physiological parameters of such subject for deriving values of cardiac efficiency and myocardial oxygen consumption;
means for establishing a boundary of physiological criticality in a first reference frame of cardiac efficiency versus myocardial oxygen consumption; and
means using said cardiac efficiency and myocardial oxygen consumption of such subject for establishing a subject data point in said first reference frame whereby a comparison is allowed between said subject data point and said boundary of physiological criticality.
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Abstract
A diagnostic and monitoring device is used to diagnose myocardial impairment, dysfunctions, and the state of critical illness. The device has utility to design and monitor therapies for differential treatment of myocardial impairment, dysfunctions, rehabilitation, and conditioning exercises. Ventricular size, pressures, and heart rate are measured to determine cardiac efficiency given by volume and pressure efficiency components, cardiac work and myocardial oxygen consumption, the data being displayed in efficiency and performance diagrams to diagnose myocardial impairment from cardiac efficiency data, dysfunctions from myocardial oxygen consumption data, and the state of critical illness from cardiac work data.
22 Citations
19 Claims
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1. A cardiac diagnostic device for monitoring a subject, said device including;
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means for measuring physiological parameters of such subject; means responsive to measurements of physiological parameters of such subject for deriving values of cardiac efficiency and myocardial oxygen consumption; means for establishing a boundary of physiological criticality in a first reference frame of cardiac efficiency versus myocardial oxygen consumption; and means using said cardiac efficiency and myocardial oxygen consumption of such subject for establishing a subject data point in said first reference frame whereby a comparison is allowed between said subject data point and said boundary of physiological criticality. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 19)
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13. A method of diagnosing myocardial impairments, dysfunctions and physiological criticality of a subject, said diagnostic method including the steps of:
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monitoring such subject to obtain measurements representative of physiological parameters; determining cardiac efficiency and myocardial oxygen consumption for such subject using said representative measurements; establishing a boundary of physiological criticality in a first reference frame of cardiac efficiency versus myocardial oxygen consumption; establishing a subject data point in said first reference frame which represents said determined cardiac efficiency and myocardial oxygen consumption for such subject; and comparing said subject data point with said boundary to indicate physiological criticality. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification