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Implantable cardiac devices and methods with body orientation unit

  • US 9,907,972 B2
  • Filed: 01/21/2011
  • Issued: 03/06/2018
  • Est. Priority Date: 01/21/2011
  • Status: Active Grant
First Claim
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1. An implantable cardiac device, comprising:

  • one or more cardiac sensors configured to detect a cardiac episode of a patient, wherein the cardiac episode comprises a ventricular tachycardia, a ventricular fibrillation, or a sudden cardiac death episode of the patient, wherein detecting the ventricular fibrillation or sudden cardiac death episode indicates a need for application of a defibrillation signal;

    a body orientation unit configured to determine a physical orientation of at least a portion of a patient'"'"'s body;

    alarm circuitry configured to, in response to the one or more cardiac sensors detecting that the patient has experienced a ventricular fibrillation or a sudden cardiac death episode, notify the patient that application of the defibrillation signal is imminent; and

    therapy circuitry configured to, after the alarm circuitry has notified the patient that application of the defibrillation signal is imminent;

    (i) apply the defibrillation signal to the patient in response to determining that (a) the patient has experienced a ventricular fibrillation or a sudden cardiac death episode indicating a need for application of the defibrillation signal and (b) the patient is in a substantially horizontal position; and

    (ii) refrain from applying the defibrillation signal to the patient in response to determining that, even though the patient has experienced a ventricular fibrillation or sudden cardiac death episode, the patient is in a substantially vertical position.

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