Method and apparatus for sensing and analyzing electrical activity of the human heart using a four electrode arrangement
First Claim
1. Instrumentation for measuring arid processing voltages produced by a human heart as sensed between selected points on the surface of a subject'"'"'s body, said instrumentation comprising:
- (a) a first electrode attachable to the anterior midline of the subject'"'"'s body at a level selected from the group consisting of;
(i) the fourth rib interspace;
(ii) the fifth rib interspace;
(b) second and third electrodes attachable to the subject'"'"'s body on opposed sides of the anterior midline below the level selected from the group consisting of the fourth rib interspace and the fifth rib interspace, but high enough so they are positioned over the subject'"'"'s ribs or intercostal spaces;
(c) a fourth electrode attachable over the subject'"'"'s manubrium sterni; and
,(d) signal processing means operatively connected to said electrodes for receiving first, second and third electrical signals present between said first, second and third electrodes as produced by said heart at said points of attachment, and for combining and scaling said signals to produce xyz vectorcardiographic signals in response thereto.
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Abstract
A method of sensing and analyzing electrical activity of the human heart comprises the sensing of voltage signals generated by the heart between four electrodes (E, A, S and I) located at key positions on the surface of a subject'"'"'s body. The E electrode is attachable to the anterior midline of the subject body at a level selected from the group consisting of the fourth rib interspace and the fifth rib interspace. The A and I electrodes are attachable to the subject'"'"'s body on opposed sides of the anterior midline below the level of the E electrode but high enough so they are positioned over the subject'"'"'s ribs or intercostal spaces. The S electrode is positioned over the subject'"'"'s manubrium sterni. Signal processing means combines and scales the voltage signals to produce xyz vectorcardiographic signals, electrocardiographic signals corresponding to the lead signals of a 12-lead electrocardiograph, or both.
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Citations
14 Claims
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1. Instrumentation for measuring arid processing voltages produced by a human heart as sensed between selected points on the surface of a subject'"'"'s body, said instrumentation comprising:
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(a) a first electrode attachable to the anterior midline of the subject'"'"'s body at a level selected from the group consisting of; (i) the fourth rib interspace; (ii) the fifth rib interspace; (b) second and third electrodes attachable to the subject'"'"'s body on opposed sides of the anterior midline below the level selected from the group consisting of the fourth rib interspace and the fifth rib interspace, but high enough so they are positioned over the subject'"'"'s ribs or intercostal spaces; (c) a fourth electrode attachable over the subject'"'"'s manubrium sterni; and
,(d) signal processing means operatively connected to said electrodes for receiving first, second and third electrical signals present between said first, second and third electrodes as produced by said heart at said points of attachment, and for combining and scaling said signals to produce xyz vectorcardiographic signals in response thereto. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Instrumentation for measuring and processing voltages produced by a human heart as sensed between selected points on the surface of a subject'"'"'s body, said instrumentation comprising:
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(a) a first electrode attachable to the anterior midline of the subject'"'"'s body at a level selected from the group consisting of; (i) the fourth rib interspace; (ii) the fifth rib interspace; (b) second and third electrodes attachable to the subject'"'"'s body on opposed sides of the anterior midline below the level selected from the group consisting of the fourth rib interspace and the fifth rib interspace, but high enough so they are positioned over the subject'"'"'s ribs or intercostal spaces; (c) a fourth electrode attachable over the subject'"'"'s manubrium sterni; and
,(d) signal processing means operatively connected to said electrodes for receiving first, second and third electrical signals present between first, second and third pairs of said electrodes as produced by said heart at said points of attachment, and for producing electrocardiographic output signals corresponding to lead signals I, II, III, aVR, aVL, aVF, V1, V2, V3, V4, V5 and V6 of a 12-lead electrocardiogram in response thereto. - View Dependent Claims (8, 9)
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10. A method of sensing and analyzing activity of a human heart comprising the steps of:
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(a) sensing voltage signals generated by the human heart between four electrodes positioned on the surface of a subject'"'"'s body at, respectively, (i) the anterior midline of the subject'"'"'s body at a level selected from the group consisting of; (A) the fourth rib interspace; (B) the fifth rib interspace; (ii) opposed sides of the anterior midline of the subject'"'"'s body below the level selected from the group consisting of the fourth rib interspace and the fifth rib interspace, but high enough to be positioned over the subject'"'"'s ribs or intercostal spaces; (iii) over the manubrium sterni of the subject'"'"'s body; and
,(b) combining and scaling such voltage signals to produce electrocardiograph output signals corresponding to lead signals I, II, III, aVR, aVL, aVF, V1, V2, V3, V4, V5 and V6 of a 12-lead electrocardiogram. - View Dependent Claims (11, 12)
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13. A method of sensing and analyzing activity of a human heart comprising the steps of:
(a) sensing voltage signals generated by the human heart between four electrodes positioned on the surface of a subject'"'"'s body at, respectively, (i) the anterior midline of the subject'"'"'s body at a level selected from the group consisting of; (A) the fourth rib interspace; (B) the fifth rib interspace; (ii) opposed sides of the anterior midline of the subject'"'"'s body below the level selected from the group consisting of the fourth rib interspace and the fifth rib interspace, but high enough to be positioned over the subject'"'"'s ribs or intercostal spaces; (iii) over the manubrium sterni of the subject'"'"'s body; and
,(b) combining and scaling such voltage signals to produce xyz vectorcardiographic output signals. - View Dependent Claims (14)
Specification