Reduced electrode electrocardiography system
First Claim
1. A method of synthesising electrocardiographic (ECG) signals by comprising receiving signals from a first group of electrodes connected to predetermined locations on a human body to acquire a first set of ECG signals and deriving at least one further ECG signal using predetermined transformation(s) on said first set of ECG signals or a subset thereof to form a desired set of signals, wherein the first group of electrodes comprises the standard 12 lead electrode sites V2 and V5 plus at least one electrode positioned substantially level with V5 on the right anterior auxiliary line, and at least one further electrode positioned on each of the right hand side and left hand side of the body
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Accused Products
Abstract
Electrocardio-graphic (ECG) signals such as the standard 12-lead are synthesised from a novel reduced electrode set. Signals are received from a group of electrodes connected to predetermined locations on a human body, and deriving at least one further ECG signal using predetermined transformation(s) (130) on said first set of ECG signals. This forms a desired set of signals. The group of electrodes may comprise the standard 12 lead electrode sites V2 and V5 plus one electrode positioned substantially level with V5 on the right anterior auxiliary line, and a further electrode on each of the right hand side and left hand side of the body. In an alternative arrangement the electrode position V2 is replaced by an electrode position Vc on the sternum directly between the standard electrode sites V1 and V2. Also disclosed is a method of improving accuracy of synthesised signals by detecting body posture and modifying the transformations.
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Citations
55 Claims
- 1. A method of synthesising electrocardiographic (ECG) signals by comprising receiving signals from a first group of electrodes connected to predetermined locations on a human body to acquire a first set of ECG signals and deriving at least one further ECG signal using predetermined transformation(s) on said first set of ECG signals or a subset thereof to form a desired set of signals, wherein the first group of electrodes comprises the standard 12 lead electrode sites V2 and V5 plus at least one electrode positioned substantially level with V5 on the right anterior auxiliary line, and at least one further electrode positioned on each of the right hand side and left hand side of the body
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30. A method for obtaining a set of electrocardiographic (ECG) signals of the general type comprising synthesising ECG signals by receiving signals from a first group of electrodes connected to predetermined locations on a human body to acquire a first set of ECG signals and deriving at least one further ECG signal using predetermined transformation(s) on said first set of ECG signals or a subset thereof to form a desired set of signals, wherein said first group includes at least electrodes located at the following sites:
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R and L;
placed on or near the right and left upper limbs respectively; and
Vc;
placed on the sternum. - View Dependent Claims (31, 32, 33, 38, 39, 50, 51)
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34. A method for obtaining a set of ECG signals of the general type comprising synthesising electrocardiographic (ECG) signals by receiving signals from a first group of electrodes connected to predetermined locations on a human body to acquire a first set of ECG signals and deriving at least one further ECG signal using predetermined transformation(s) on said first set of ECG signals or a subset thereof to form a desired set of signals, wherein said first group includes at least electrodes located at the following sites:
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Vm;
one of the standard 12 lead electrode sites V4, V5 and V6 (m=4, 5 or
6);
VnR;
level with one of the standard electrode sites V4, V5 and V6 (n=4, 5 or
6) on the right midclavicular line, right anterior auxiliary line or right midauxiliary line respectively; and
Vc;
placed on the sternum. - View Dependent Claims (35, 36, 37, 52, 53)
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40. A method for obtaining a set of electrocardiographic (ECG) signals by:
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receiving signals from a first group of electrodes connected to predetermined locations on a human body to acquire a first set of ECG signals;
synthesising at least one further ECG signal using predetermined transformation(s) on said first set of ECG signals or a subset thereof to form a synthesised set of ECG signals, each synthesised signal corresponding to a location on the body (hereinafter referred to as the synthesised location);
detecting the body'"'"'s posture; and
selecting or modifying the transformations used in said synthesising step on the basis of the detected body posture, so as to reduce posture-induced inaccuracies between each synthesised signal and a real signal that would be measured at the synthesised location in a given posture. - View Dependent Claims (41, 54, 55)
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Specification