Heart pacemaker

• US 4,763,646 A
• Filed: 12/09/1987
• Issued: 08/16/1988
• Est. Priority Date: 10/04/1985
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Lekholm, Anders
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US07/131,269
• Time in Patent Office: 251 Days
• Field of Search: 128/419 PG
• US Class Current: 607/14
• CPC Class Codes: A61N 1/36514 controlled by a physiological quantity other than heart potential, e.g. blood pressure controlled by two or more physical parameters A61N1/36585

Abstract

A heart pacemaker for supplying pacing signals to a heart includes circuitry for controlling operation of the pacemaker in dependence upon the occurrence of heart sounds. The pacemaker includes a detector for such sounds and circuitry for generating a control signal therefrom which is supplied to the basic pacing circuitry.

Claims

1. A heart pacemaker comprising:

a housing having a size adapted for implantation in a patient;

pulse generator means in said housing for generating pulses for supply to heart tissue of said patient;

acoustic detector means disposed relative to said heart for detecting heart sounds and for generating electrical signals corresponding thereto, said acoustic detector means having a size adapted for implantation in said patient with said housing; and

means in said housing connected to said acoustic detector means and to said pulse generator means for controlling said pulse generator based on said electrical signals.

2. The pacemaker of claim 1, wherein said detector means is a microphone.

3. The pacemaker of claim 1, wherein said detector means is a pressure detector.

4. The pacemaker of claim 1, wherein said detector means is an accelerometer.

5. The pacemaker of claim 1, wherein said pacemaker has an electrode lead attached to the heart tissue for supplying said pulses thereto, and wherein said detector means is disposed in said electrode lead.

6. The pacemaker of claim 1, wherein said detector means is disposed inside said housing.

7. The pacemaker of claim 1, wherein said detector means is disposed outside of said housing.

8. The pacemaker of claim 1, wherein said pulse generator means includes means for monitoring cardiac contraction following emission of a stimulation pulse, said means for monitoring cardiac contraction being connected to said detector means.

9. The pacemaker of claim 1, wherein said pulse generator means includes means for monitoring for tachycardia, said means for monitoring for tachycardia being connected to said detector means.

10. The pacemaker of claim 1, wherein said pulse generator means includes means for monitoring for heart fibrillation, said means for monitoring for heart fibrillation being connected to said detector means.