Methods and Apparatus to Increase Secretion of Endogenous Naturetic Hormones

• US 20170274190A1
• Filed: 06/05/2017
• Published: 09/28/2017
• Est. Priority Date: 03/02/2005
• Status: Active Grant

• Current Assignee: Backbeat Medical, LLC
• Original Assignee: Backbeat Medical, Inc.
• Inventors: Levin, Howard, Gelfand, Mark
• Granted Patent: US 10,369,333 B2
• Time in Patent Office: Days
• CPC Class Codes: A61M 2025/102 driven by a solenoid-activated pump
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00
• CPC Class Codes: A61M 25/1018 Balloon inflating or inflation-control devices
• CPC Class Codes: A61M 25/10181 Means for forcing inflation fluid into the balloon
• CPC Class Codes: A61M 25/10184 Means for controlling or monitoring inflation or deflation
• CPC Class Codes: A61M 29/00 Dilators with or without means for introducing media, e.g. remedies instruments for performing visual medical inspections of cavities or tubes of the body A61B1/00
• CPC Class Codes: A61N 1/36117 for treating hypertension
• CPC Class Codes: A61N 1/3627 for treating a mechanical deficiency of the heart, e.g. congestive heart failure or cardiomyopathy
• CPC Class Codes: A61N 1/368 comprising more than one electrode co-operating with different heart regions A61N1/3622, A61N1/3627 take precedence
• CPC Class Codes: A61N 1/37235 Aspects of the external programmer

Abstract

A method and apparatus for treatment of heart failure by increasing secretion of endogenous naturetic hormones ANP and BNP such as by stimulation of the heart atria. Heart pacing is done at an atrial contraction rate that is increased and can be higher than the ventricular contraction rate. Pacing may include mechanical distension of the right atrial appendage. An implantable device is used to periodically cyclically stretch the walls of the appendage with an implanted balloon.

Claims

1. A method for treating a patient comprising:

determining that the patient is suffering from a condition comprising one or more of hypertension, excessive fluid retention, or excessive sodium retention;

treating the condition by stressing a wall of at least one atrium of a heart of the patient beyond a natural stress condition of the wall, such that the stressed wall secretes a hormone at an elevated level above a natural secretion level occurring naturally when the wall of the at least one atrium is not stressed by the stressing,

wherein stressing the wall of the at least one atrium of the heart comprises stretching the at least one atrium; and

achieving a beneficial therapeutic effect in the patient by the hormone secreted at the elevated level, wherein the beneficial therapeutic effect includes a reduction in blood pressure.

2. The method of claim 1, wherein stretching the at least one atrium comprises expanding an expandable device implanted in an atrial appendage of the heart to temporarily stretch the wall of the at least one atrium.

3. The method of claim 2, wherein the expandable device comprises an inflatable balloon.

4. The method of claim 2, wherein stretching the at least one atrium comprises expanding and contracting the expandable device, and

wherein expanding and contracting the expandable device comprises using an implanted pump connected to the expandable device to bidirectionally shuttle fluid in a closed system between the expandable device and the implanted pump.

5. The method of claim 2, further comprising anchoring the expandable device to an apex of a right atrial appendage of the heart.

6. The method of claim 1, wherein stressing the wall of the at least one atrium of the heart comprises stretching the wall and then restoring the wall to a substantially pre-stretched condition.

7. The method of claim 1, wherein stressing the wall of the at least one atrium comprises mechanical distension of a right atrial appendage of the heart.

8. The method of claim 1, wherein the beneficial therapeutic effect includes one or more of:

limiting a degree of vasoconstriction, limiting a degree of sodium retention, increasing urine output, inhibiting a renin-angiotensin system, inhibiting endothelin secretion, inhibiting systemic and renal sympathetic activity, or counteracting effects of at least one of norepinephrine, endothelin, and angiotensin II.

9. The method of claim 1, wherein stretching the at least one atrium comprises expanding a volume of the at least one atrium.

10. The method of claim 1, wherein stretching the at least one atrium comprises a cycle of expanding a volume of the at least one atrium for a plurality of minutes followed by a plurality of minutes of rest.

11. The method of claim 10, wherein stressing the wall of the at least one atrium of the heart further comprises repeating the cycle for a plurality of hours a plurality of times a day.

12. The method of claim 1, wherein stretching the at least one atrium comprises one or more of pulling on an atrial appendage, pulling on the atrium, or pulling on a junction between the atrium and a vessel.

13. The method of claim 1, wherein stressing the wall of the at least one atrium of the heart comprises cyclically stretching and contracting the at least one atrium.

14. The method of claim 1, wherein stressing the wall of the at least one atrium of the heart comprises periodically stretching the at least one atrium.

15. The method of claim 14, wherein periodically stretching the at least one atrium comprises stretching the at least one atrium for each heartbeat of a therapy session.

16. The method of claim 14, wherein periodically stretching the at least one atrium comprises stretching the at least one atrium when the atrium contracts during a heartbeat.

17. The method of claim 14, wherein periodically stressing the wall of the at least one atrium of the heart comprises stretching the at least one atrium for one or more heartbeats followed by one or more heartbeats of rest.

18. The method of claim 14, wherein periodically stressing the wall of the at least one atrium of the heart comprises stretching the at least one atrium for every heartbeat for a designated amount of time followed by a designated amount of time of rest.