In the seventies of the past century ballistocardiography had been thought to be obsolete in cardiology for impossibility of objective calibration. In the present work the quantitative ballistocardiography (Q-BCG) for measurement of systolic force (F) and minute cardiac force (MF) in sitting subject was described. The new principle of piezoelectric transducer enabled to register the force caused by the heart and blood movement, which was not measured before. The calibration proved that the action of the force on the transducer was expressed quantitatively without the amplitude-, time-, and phase deformation. The close relationship of skeletal muscle force and F was proved. The F and MF changed under different physiological conditions (age, partial pressure of oxygen, body weight, skeletal muscle force). It was shown that the systolic force (F) and minute cardiac force (MF) are the physiological parameters neurohumorally regulated similarly as the heart rate or systolic volume.
Pulse dye densitometry (PDD) enables the evaluation of
hemodynamic state as well as liver function. A repeated
examination, even after a short pause (or under stress
condition), enables to follow safely the dynamics of liver
pathology. From presented parameters we have evaluated as
reliable the C5-clearance, an expression of equilibrium state in
the two compartment liver system. Furthermore, T-index
expresses ratio of C5 value to cardiac output, it is a sensitive
indicator of the blood pole, i.e. sinusoidal uptake, which is in very
good correlation with staging of hepatopathies. The isolated h
constant in correlation to T-index is valuable For functional
grading. The Japanese automatic analyzer of indocyanine green
(ICG) dilution and elimination curves, after incorporation of a two
compartment mathematical model, becomes more useful for
complex hepatological diagnostics. Non-invasive PDD is becoming
of uppermost importance to clinical interest, yielding comparable
results as other complicated and invasive examinations and may
be, therefore, repeated in short time intervals for different
indications with minimal stress of examined patient.
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