Ischemia detector and heart stimulator provided with such an ischemia detector
AssigneePacesetter, Inc.
InventorsChrister Ekwall, Christina Nyhlén
Life of this patent
Estimating the term…
Abstract
An ischemia detector has a sensor unit which determines the systolic pressure of a subject, a unit wherein a relation is established between the systolic pressure and the subject's heart rate, as the heart rate is varied over a range, and an analyzer which determines the occurrence of ischemia from this relation.
Claims23
An ischemia detector, comprising a sensor unit which emits a signal representing systolic pressure of a subject, means for establishing a relation between said systolic pressure and a heart rate of a subject over a plurality of varying heart rates, and analyzer means for determining an occurrence of ischemia from said relation.
An ischemia detector comprising a sensor unit which determines a pressure difference between an end systolic pressure and an end diastolic pressure of a subject, means for establishing a relation between said pressure difference a heart rate of a subject when over a plurality of heart rates, and analyzer means for determining an occurrence of ischemia from said relation.
A heart stimulator comprising:
- a pulse generator which emits stimulation pulses at a stimulation rate;
- an electrode lead connected to said pulse generator and adapted for in vivo implantation in a subject to deliver said stimulation pulses to cardiac tissue, said electrode lead having at least one electrode adapted for contact with cardiac tissue;
- means for operating said stimulation generator to vary said pulse rate over a plurality of stimulation rates;
- and
- an ischemia detector comprising a sensor unit which emits a signal representing systolic pressure of a subject receiving said stimulation pulses, means for establishing a relation between said systolic pressure and a heart rate of a subject over a plurality of heart rates represented by said plurality of stimulation rates, and analyzer means for determining an occurrence of ischemia from said relation.
A heart stimulator comprising:
- a pulse generator which emits stimulation pulses at a stimulation rate;
- an electrode lead connected to said pulse generator and adapted for in vivo implantation in a subject to deliver said stimulation pulses to cardiac tissue, said electrode lead having at least one electrode adapted for contact with cardiac tissue;
- means for operating said stimulation generator to vary said pulse rate over a plurality of stimulation rates;
- and
- an ischemia detector comprising a sensor unit which determines a pressure difference between an end systolic pressure and an end diastolic pressure of a subject, means for establishing a relation between said pressure difference and a heart rate of a subject over a plurality of heart rates represented by said plurality of rates rates, and analyzer means for determining an occurrence of ischemia from said relation.
Dependencies are inferred from the claim text.