SYSTEM AND METHOD OF DETERMINING ARTERIAL BLOOD PRESSURE AND VENTRICULAR FILL PARAMETERS FROM VENTRICULAR BLOOD PRESSURE WAVEFORM DATA
First Claim
1. An implantable medical device, comprising:
- an input circuit that receives a pressure waveform signal representative of a pressure (P) sensed within a ventricle of a patient'"'"'s heart as a function of time (t); and
a processor that derives from the pressure waveform signal at least one hemodynamic parameter based upon at least one ventricular pressure value during a portion of the pressure waveform signal between a peak ventricular pressure and a beginning of a next ventricular pumping cycle.
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Accused Products
Abstract
A system and method of determining hemodynamic parameters uses sensed ventricular blood pressure during a portion of ventricular pressure waveform following peak pressure. An estimated arterial diastolic pressure is based upon an amplitude of the sensed ventricular pressure corresponding to a time at which a first derivative of ventricular pressure as a function of time is at a minimum (dP/dtmin). Fill parameters such as isovolumetric relaxation constant, ventricular suction pressure, atrial kick pressure, and transvalve pressure gradient are derived from measured pressures representing minimum ventricular pressure, ventricular diastolic pressure, and diastasis pressure.
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Citations
25 Claims
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1. An implantable medical device, comprising:
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an input circuit that receives a pressure waveform signal representative of a pressure (P) sensed within a ventricle of a patient'"'"'s heart as a function of time (t); and a processor that derives from the pressure waveform signal at least one hemodynamic parameter based upon at least one ventricular pressure value during a portion of the pressure waveform signal between a peak ventricular pressure and a beginning of a next ventricular pumping cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method, comprising:
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sensing ventricular blood pressure to produce a ventricular pressure waveform; and deriving at least one hemodynamic parameter based upon at least one ventricular pressure during a portion of the ventricular pressure waveform between a peak ventricular pressure and a beginning of a next ventricular pumping cycle. - View Dependent Claims (15, 16, 17)
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18. An implantable medical device, comprising:
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an input circuit that receives a pressure waveform signal representative of a pressure (LVP) sensed within a left ventricle of a patient'"'"'s heart as a function of time (t); and a processor that derives from the pressure waveform signal at least one hemodynamic parameter based upon at least one left ventricular pressure value. - View Dependent Claims (19, 20)
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21. A method, comprising:
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sensing left ventricular blood pressure to produce a left ventricular pressure waveform; and deriving at least one hemodynamic parameter based upon at least one left ventricular pressure during a left ventricular pressure waveform. - View Dependent Claims (22, 23, 24, 25)
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Specification