System and/or method for refibrillation of the heart for treatment of post-countershock pulseless electrical activity and/or asystole

• US 20100094368A1
• Filed: 12/09/2009
• Published: 04/15/2010
• Est. Priority Date: 10/23/2001
• Status: Abandoned Application

• Current Assignee: Johns Hopkins University
• Original Assignee: Johns Hopkins University
• Inventors: Halperin, Henry R., Leng, Charles T., Berger, Ronald D.
• Application Number:
  US12/654,052
• Publication Number:
  US 20100094368A1
• Time in Patent Office: Days
• US Class Current: 607/5
• CPC Class Codes: A61N 1/385 Devices for inducing an abnormal cardiac function, e.g. fibrillation

Abstract

A method and/or system for inducing ventricular fibrillation (VF) of the heart for treatment of post-countershock pulseless electrical activity (PEA) or asystole. In certain example embodiments, it has been found that reinduction of ventricular fibrillation, followed by restoration of blood flow with cardiopulmonary resuscitation (CPR), can make subsequent countershocks more successful in restoring a heart rhythm associated with blood flow.

Claims

1. A method of treating pulseless electrical activity (PEA) or asystole in a heart of a patient, the method comprising:

determining if the heart is in PEA or asystole; and

when it is determined that the heart is in PEA or asystole, then applying electric energy in order to induce ventricular fibrillation (VF) in the heart and thereafter performing cardiopulmonary resuscitation (CPR).

2. The method of claim 1, wherein the electric energy that is applied in order to induce VF is applied via a plurality of electrodes.

3. The method of claim 2, wherein all of the electrodes are external to the heart.

4. The method of claim 2, wherein at least one of the electrodes is external to the heart and at least another of the electrodes is internal to the heart.

5. The method of claim 1, further comprising determining whether or not the heart is beating to generate a predetermined level of blood flow before applying the electric shock in order to induce the VF, so that the electric energy is applied to induce the VF only when it is determined that the heart is not beating to generate the predetermined level of blood flow.

6. The method of claim 1, further comprising the step of detecting VF and using an electric shock to terminate the VF thereby causing the heart to be in PEA or asystole, and thereafter applying the electric energy in order to induce VF.

7. A method of treating pulseless electrical activity (PEA) or asystole in a heart of a patient, the method comprising:

determining if the heart is in PEA or asystole; and

when it is determined that the heart is in PEA or asystole, then applying electric energy in order to induce ventricular fibrillation (VF) in the heart.

8. A device for inducing ventricular fibrillation (VF) in a heart of a patient, the device comprising:

detection circuitry for determining whether the heart is in PEA or asystole; and

a plurality of electrodes for inducing VF in the heart in response to detecting at least that the heart is in PEA or asystole.

9. The device of claim 8, further comprising blood flow detection circuitry for determining whether or not the heart is beating to generate at least a predetermined level of blood flow, and wherein the VF is not induced via the plurality of electrodes unless it is determined that the heart is not beating to generate at least the predetermined level of blood flow.

10. The device of claim 8, further comprising defibrillation circuitry for causing electric shock to be applied to a heart for terminating VF.

11. A device for inducing ventricular fibrillation (VF) in a heart of a patient, the device comprising:

detection circuitry for determining whether the heart is in PEA; and

a plurality of electrodes for inducing VF in the heart in response to detecting at least that the heart is in PEA.